Windows 10 Insider Preview build history
Changelog

Windows 10 Insider Preview build history tracker

The Windows 10 Insider Preview build history guide helps you to track the latest testing pre-releases of the operating system that Microsoft makes available for PC.

UPDATED 10/21: As part of the Windows 10 development, Microsoft has the Windows Insider Program, a testing program that allows developers, businesses, and enthusiasts to access early builds of the operating system to test new features and changes, and validate software and drivers before deployments. In this guide, you can track the history of every Windows 10 Insider Preview build for PC, including information about their release date, changelog summary, build number, and more.

The program includes three readiness levels (also known as channels). The Dev Channel (formerly Fast ring) is for highly technical users, since builds are rough and contain code that is still under heavy development. Usually, these builds are not stable, you’ll come across errors and problems, and you may have to use workarounds to fix problems that may affect your experience.

Also, previews in this channel are not attached to any specific release of Windows 10, which means that changes will be integrated in future releases when they’re ready, and not necessarily in the next feature update. Furthermore, when some improvements are ready, they could arrive as a build update or servicing release.

The Beta Channel (formerly Slow ring) is for anyone who want to test upcoming features or needs to validate apps and deployments. Previews in this channel are stable, but you may still run into issues. Also, features included in this channel are expected to ship with the next release of Windows 10.

Finally, the Release Preview Channel (formerly Release Preview ring) offers the final build of the next version of Windows 10, before it’s available to the public, with advanced quality updates and certain key features.

If you have a device enrolled in any of these channels, you can use this guide to track the history of every Windows 10 Insider Preview build.

Windows 10 21H1 Insider Preview build history

Windows 10 21H1 is the eleventh feature update expected to arrive sometime in 2021. Some of the features and changes planned for this new version are already available through the Dev Channel. However, since builds in the Dev Channel are not tied to any specific release, it’s unclear what features the next release will include.

Below you’ll find the history of the Windows Insider Preview builds released in the Dev Channel. The latest version available for testers is Windows 10 build 20241.

Check out all the features and changes coming to Windows 10 21H1.

 Release dateBuild numberChannelPlatformNotes
44October 21, 202020241DevPCMinor update.
App splash screen.
Defrag update.
43October 16, 202020236.1005DevPCMinor update.
KB4587587
42October 14, 202020236DevPCMinor update.
Refresh rate.
Recent searches.
41October 12, 202020231.1005DevPCMinor update.
KB4586238
40October 7, 202020231DevPCMajor update.
Customize your device OOBE.
39September 30, 202020226DevPCMajor update.
Drive health feature.
38September 23, 202020221DevPCMinor update.
Meet Now.
37September 16, 202020215DevPCMinor update.
Search dark theme.
36September 10, 202020211DevPCMinor update.
Linux filesystem access.
Default apps search.
35August 26, 202020206DevPCMajor update.
New Emoji Picker.
Voice Typing.
Touch keyboard tweaks.
34August 26, 202020201DevPCMinor update.
Bug fixes.
33August 21, 202020197DevPCMinor update.
Disk Management in Settings.
Edge Alt + Tab changes.
32August 12, 202020190DevPCMinor update.
Graphics settings.
Welcome experience.
31August 5, 202020185DevPCMinor update.
DNS settings.
DoH option.
30July 29, 202020180DevPCMinor update.
Smaller folder icon in Start.
Fixes.
29July 22, 202020175DevPCMinor update.
PowerShell reset app.
Snip & Sketch app icon.
Sticky Notes app icon.
28July 15, 202020170DevPCMinor update.
Sound settings.
Settings app icon.
27July 1, 202020161DevPCMinor update.
Start menu new design.
Personalized taskbar.
Settings changes.
Notifications changes.
Edge in Alt+Tab.
26June 24, 202020152DevPCMinor update.
25June 17, 202020150DevPCMinor update.
WSL changes.
Settings tweaks.
Windows Security improvements.
24June 10, 202019645Fast ringPCMinor update.
Nested Virtualization for AMD.
Remove Linux kernel from local image.
23June 3, 202019640Fast ringPCMinor update.
22May 27, 202019635Fast ringPCMinor update.
21May 21, 202019631Fast ringPCMinor update.
20May 13, 202019628Fast ringPCMinor update.
DNS over HTTPS.
19May 6, 202019624Fast ringPCMinor update.
VPN change.
Bluetooth text fix.
18April 29, 202019619Fast ringPCMinor update.
17April 27, 202019613.1005Fast ringPCMinor update.
KB4558320.
16April 22, 202019613Fast ringPCMinor update.
Fixes.
15April 17, 202019608.1006Fast ringPCMinor update.
KB4557426
14April 15, 202019608Fast ringPCMinor update.
Default apps search.
13April 8, 202019603Fast ringPCMinor update.
File Explorer WSL option.
Storage cleanup recommendations.
12March 25, 202019592Fast ringPCMinor update.
Tablet mode.
Search improvements.
11March 18, 202019587Fast ringPCMinor update.
Bug fixes.
10March 12, 202019582Fast ringPCMinor update.
About settings.
Time & Date settings.
Eye Control update.
Bug fixes.
9March 5, 202019577Fast ringPCMinor update.
Diagnostic settings.
Windows Security icon.
Bug fixes.
8February 20, 202019569Fast ringPCMinor update.
New colorful icons.
Bug fixes.
7February 12, 202019564Fast ringPCMinor update.
Graphic settings.
Bug fixes.
6February 5, 202019559Fast ringPCMinor update.
Bug fixes.
Hyper-V for ARM64.
5January 30, 202019555Fast ringPCMinor update.
Bug fixes.
4January 23, 202019551Fast ringPCMinor update.
Bug fixes.
Optional updates experiment.
3January 16, 202019546Fast ringPCMinor update.
Bug fixes.
Calculator graphic preview.
Index diagnostics app release.
2January 8, 202019541Fast ringPCMinor update.
Task Manager Details tab update.
Taskbar new location icon.
1December 16, 2019 19536Fast ringPCMinor update.
Optional features download.
Family group setup.

Windows 10 20H2 Insider Preview build history

Windows 10 20H2 (October 2020 Update) is the tenth feature update expected to release in October 2020. Below you’ll find the history of the Windows Insider Preview builds released in the Beta Channel (formerly Slow ring). The latest version available for testers is Windows 10 build 19042.572.

Check out all the new features and changes expected to arrive to Windows 10 20H2.

 Release dateBuild numberChannelPlatformNotes
10October 13, 202019042.572 (KB4579311)Beta
Release Preview
PCBug fixes.
Improvements.
9September 30, 202019042.546 (KB4577063)Beta
Release Preview
PCBug fixes.
Improvements.
8September 22, 202019042.541 (KB4577063)Beta
Release Preview
PCBug fixes.
Improvements.
7September 8, 202019042.508 (KB4571756)BetaPCBug fixes.
6August 26, 202019042.487 (KB4571744)BetaPCBug fixes.
5August 11, 202019042.450 (KB4566782)BetaPCRe-release of 19042.450.
Plus bug fixes.
4July 31, 202019042.423 (KB4568831)BetaPCRe-release of 19042.423.
Plus bug fixes.
3July 24, 202019042.421 (KB4568831)BetaPCBig update.
Bug fixes.
Start menu design.
Taskbar personalization.
Microsoft Edge changes.
About settings tweaks.
Notifications tweaks.
2July 14, 202019042.388BetaPCMinor update.
Bug fixes.
1June 16, 202019042.330 BetaPCMinor update.
Printer fix.
Chromium Edge.

Windows 10 version 2004 Insider Preview build history

Windows 10 version 2004 (May 2020 Update) — also known as the 19H1 update — is the ninth feature update that was released on May 21, 2019. Below you’ll find the history of the Windows Insider Preview builds released in the Fast, Slow, and Release Preview rings. The latest version available for testers is Windows 10 build 19041.264.

Check out all the features and changes coming to Windows 10 version 2004 (20H1).

 Release dateBuild numberRingPlatformNotes
59May 12, 202019041.264Release Preview ring
Slow ring
PCMinor update.
KB4556803
58April 30, 202019041.208Release Preview ringPCMinor update.
KB4558244
57April 22, 202019041.208Slow ringPCMinor update.
KB4558244
56April 17, 202019041.207Release Preview ringPCMinor update.
55April 14, 202019041.207Slow ringPCMinor update.
KB4550936
54April 10, 202019041.172Slow ringPCMinor update.
KB4552455
53March 26, 202019041.172Slow ringPCMinor update.
KB4552455
52March 13, 202019041.153Slow ringPCMinor update.
KB4541738
51February 27, 202019041.113Slow ringPCMinor update.
KB4540409
50February 12, 202019041.84Slow ringPCMinor update.
KB4539080
49January 15, 202019041.21Slow ringPCMinor update.
KB4535550
48December 11, 2019 19041Fast ring
Slow ring
PCMinor update.
Quick searches for Search Home.
47December 4, 2019 19035Fast ring
Slow ring
PCMinor update.
Driver downloads removed.
Notepad old version restored.
46November 27, 2019 19033Fast ring
Slow ring
PCMinor update.
Version 2004.
45November 22, 2019 19030Fast ringPCMinor update.
Remove watermark.
Almost RTM.
44November 20, 2019 19025.1051Slow ringPCMinor update.
43November 19, 2019 19028Fast ringPCMinor update.
42November 15, 2019 19025Fast ringPCMinor update.
Search algorithm update.
41November 12, 2019 19023Fast ringPCMinor update.
40November 11, 2019 19013.1122Slow ringPCMinor update.
39November 5, 2019 19018Fast ringPCMinor update.
38November 4, 2019 19013.1002Fast ringPCMinor update.
KB4528630.
RDP fix.
37November 1, 2019 19013.1000Fast ringPCMinor update.
KB4528332.
36October 29, 2019 19013Fast ringPCMinor update.
DirectX Raytracing.
Updated Kaomoji.
35October 22, 2019 19008Fast ringPCMinor update.
No new features.
34October 17, 2019 19002Fast ringPCMinor update.
No new features.
33October 8, 2019 18999Fast ringPCMinor update.
No new features.
32October 3, 2019 18995Fast ringPCMinor update.
PIN on Safe mode.
31September 24, 2019 18990Fast ringPCMinor update.
Restart apps changes.
Magnifier improvements.
Narrator improvements.
30September 19, 2019 18985Fast ringPCMinor update.
Bluetooth pair changes.
Windows Update with optional updates.
29September 11, 2019 18980Fast ringPCMinor update.
Cortana app available worldwide.
WSL2 ARM64 support.
Vibranium codename reference.
28September 6, 2019 18975Fast ringPCMinor update.
Cortana resize and drag.
27August 29, 2019 18970Fast ringPCMajor update.
Reset this PC, Cloud Download.
New tablet mode experience.
26August 22, 2019 18965.1005Fast ringPCMinor update.
KB4517787 (test).
25August 21, 2019 18965Fast ringPCMinor update.
Restart apps in Sign-in options settings.
New Feedback app.
24August 16, 2019 18963Fast ringPCModerate update.
GPU temperature monitor in Task Manager.
Optional Features changes.
Rename virtual desktops.
Mouse cursor speed control in Settings.
Notepad now Microsoft Store app.
23August 7, 2019 18956Fast ringPCModerate update.
Status settings update.
Notifications settings update.
File Explorer drops Homegroup options context menu.
22July 31, 2019 18950Fast ringPCMinor update.
Japanese IME.
Snip & Sketch tweaks.
Reset this PC with Cloud download option.
21July 26, 2019 18945Fast ringPCMinor update.
Cortana app.
File Explorer with Windows Search.
Windows Defender renamed to Microsoft Defender.
20July 18, 2019 18941Fast ringPCMinor update.
Korean IME update.
19July 10, 2019 18936Fast ringPCMinor update.
Quick event from taskbar.
Passwordless settings.
18July 3, 2019 18932Fast ringPCMinor update.
Eye Control changes.
Notifications changes.
Sync settings engine upgrade.
17June 19, 2019 18922Fast ringPCMinor update.
Language settings.
Feedback Hub changes.
Fixes.
16June 12, 2019 18917Fast ringPCMinor update.
WSL 2.
Delivery Optimization settings.
Windows Ink Workspace update.
15June 5, 2019 18912Fast ringPCMinor update.
14May 29, 2019 18908Fast ringPCMinor update.
YourPhone new features.
13May 15, 2019 18898Fast ringPCMinor update.
Drive type on Task Manager.
12May 10, 2019 18895Fast ringPCMinor update.
Fixes Your Phone app.
11May 8, 2019 18894Fast ringPCMinor update.
File Explorer cloud search.
10May 1, 2019 18890Fast ringPCMinor update.
Kills Friendly Dates.
9April 26, 2019 18885Fast ringPCMinor update.
8April 10, 2019 18875Fast ring
Skip Ahead
PCMinor update.
IME changes.
7March 27, 2019 18865Skip AheadPCMinor update.
No new features.
6March 20, 2019 18860Skip AheadPCMinor update.
SwiftKey languages.
5March 13, 2019 18855Skip AheadPCMinor update.
Notepad unsaved recovery.
4March 6, 2019 18850Skip AheadPCMinor update.
No new features.
3February 28, 2019 18845Skip AheadPCMinor update.
No new features.
2February 22, 2019 18841Skip AheadPCMinor update.
No new features.
1February 14, 2019 18836Skip AheadPCMinor update.
No new features.

Windows 10 version 1909 Insider Preview build history

Codenamed 19H2, Windows 10 version 1909 (November 2019 Update) was the eighth next major update released on November 12, 2019, as a cumulative update with new features and changes. Below you’ll find the history of the Windows Insider Preview builds released in the Fast, Slow, and Release Preview rings. The latest version available for testers is Windows 10 build 18362.10024 (Slow ring). If you’re in the Release Preview ring, the version number is Windows 10 build 18363.418.

 Release dateBuild numberRingPlatformNotes
18October 21, 201918363.418 Release PreviewPCMinor update.
Moves build 18362.10024 to 18363.418
17October 16, 201918362.10024 SlowPCMinor update.
Enables all features for version 1909.
16October 8, 201918363.418Release PreviewPCMinor update.
Fixes.
15October 3, 201918363.388Release PreviewPCMinor update.
Fixes.
14September 27, 201918363.387Release PreviewPCMinor update.
Fixes.
13September 25, 201918362.10022SlowPCMinor update.
Fixes.
12September 23, 201918363.385Release PreviewPCMinor update.
All features enabled.
Not final version.
11September 23, 201918362.385Release PreviewPCMinor update.
All features enabled.
Not final version.
10September 5, 201918362.10019SlowPCMinor update.
All features enabled.
9August 29, 201918363.329Release PreviewPCMinor update.
Two fixes.
8August 27, 201918363.327Release PreviewPCMinor update.
Increases build number to 18363.
Not final version.
7August 19, 201918362.10015SlowPCMinor update.
Updates build 18362.10013.
Windows Defender Credential Guard for ARM64.
Win32 (desktop) apps support from Microsoft Intune on Windows 10 S.
6August 19, 201918362.10014SlowPCMinor update.
Updates build 18362.100012.
Same features as build 18362.10015, but disabled.
5August 8, 201918362.10013SlowPCMinor update.
Updates build 18362.10006.
Calendar event taskbar.
Notifications changes.
Battery life improvements.
CPU scheduling improvements.
4August 8, 201918362.10012SlowPCMinor update.
Updates build 18362.10005.
Same features as build 18362.10013, but disabled.
3July 17, 201918362.10006SlowPCMinor update.
2July 15, 201918362.10005SlowPCMinor update.
3rd-party assistants Lock screen.
1July 2, 201918362.10000SlowPCMinor update.
No new features.
0February 8, 201918334Skip AheadPCMinor update.
No new features.

Windows 10 version 1903 Insider Preview build history

Codenamed 19H1, Windows 10 version 1903 (May 2019 Update) was the seventh major update released on May 21, 2019. Below you’ll find the history of the Windows Insider Preview builds released in the Fast, Slow, and Release Preview rings. The latest version available to Insiders in the Fast ring is Windows 10 build 18362 and build 18362.30 in the Slow ring. Also, on April 8, 2019, Microsoft is making available Windows 10 build 18362.30 as final version for the May 2019 Update in the Release Preview ring.

Check out all the features and changes coming to Windows 10 19H1.

 Release dateBuild numberRingPlatformNotes
42April 8, 2019 18362.30Release PreviewPCFinal version
41April 5, 2019 18362.30Slow ring
Fast Ring
PCKB4497464
40April 3, 2019 18356.21Slow ringPCKB4496796
39March 22, 2019 18362Slow ringPCMinor update.
Bug fixes.
38March 20, 2019 18362Fast ringPCMinor update.
Bug fixes.
37March 19, 2019 18361Fast ringPCMinor update.
Bug fixes.
36March 19, 2019 18356.16Slow ringPCKB4494123
35March 15, 2019 18358Fast ringPCMinor update.
Bug fixes.
34March 15, 2019 18356.1Slow ringPCMinor update.
Quality update.
33March 14, 2019 18351.26Slow ringPCKB4494195
32March 13, 2019 18351.8Slow ringPCKB4492310
31March 12, 2019 18356Fast ringPCMinor update.
Bug fixes.
Your Phone mirroring.
30March 11, 2019 18351.7Slow ringPCKB4492310
29March 8, 2019 18353Fast ringPCMinor update.
Bug fixes.
Windows Sandbox changes.
28March 5, 2019 18351Fast ringPCMinor update.
Bug fixes.
27March 1, 2019 18348Fast ringPCMinor update.
Bug fixes.
26February 27, 2019 18342.8Slow ringPCMinor update.
Bug fixes.
25February 26, 2019 18346Fast ringPCMinor update.
Bug fixes.
24February 22, 2019 18343Fast ringPCMinor update.
Bug fixes.
23February 20, 2019 18342Fast ringPCMinor update.
File Explorer allows dot in filenames.
Gaming improvements.
Linux file access.
Windows Sandbox configuration.
Bug fixes.
22February 8, 2019 18334Fast ringPCMinor update.
Gaming improvements.
Bug fixes.
21February 1, 2019 18329Fast ringPCMinor update.
Search with top apps.
Mixed Reality with Win32 app support.
20January 24, 2019 18323Fast ringPCMinor update.
RAW image file format changes.
Light theme improvements.
19January 16, 2019 18317Fast ringPCMinor update.
Cortana Search split.
StartMenuExperienceHost.exe.
Font drag/drop install.
Insider settings updated.
18January 9, 2019 18312Fast ringPCMinor update.
Reserved Storage.
Fiber Local Storage more slots.
Reset this PC new UI.
Disable acrylic option for Sign-in screen.
17January 3, 2019 18309Fast ringPCMinor update.
Windows Hello reset design for all editions.
Passwordless auth for all editions.
Cortana is off during clean install.
16December 19, 2018 18305Fast ringPCBig update.
Windows Sandbox.
Password-less authentication.
Settings homepage redesign.
Symbols on emoji panel.
15December 10, 2018 18298Fast ringPCBig update.
File Explorer new icon.
Setup new IU.
Console Terminal settings.
Security Key setup.
14November 28, 2018 18290Fast ringPCMinor update.
Start menu tweaks.
Date & Time manual time sync.
13November 14, 2018 18282Fast ringPCBig update.
Light theme.
Printing options.
Windows Update changes.
12November 7, 2018 18277Fast ringPCMinor update.
Action Center brightness slider.
Focus assist everything full screen.
WDAG settings.
Emoji 12.
11October 31, 2018 18272Fast ringPCMinor update.
Sign-in options update.
SwiftKey more languages.
Indic Phonetic keyboards.
10October 24, 2018 18267Fast ringPCMinor update.
Searching Windows.
Touch keyboard improvements.
9October 17, 2018 18262Fast ringPCMinor update.
Task Manager DPI Aware.
Uninstall built-in apps.
Automatic troubleshooter.
8October 3, 2018 18252Fast ring
Skip Ahead
PCMinor update.
Ethernet settings.
Disconnected network icon.
Ebrima font.
7September 26, 2018 18247Skip AheadPCMinor update.
No new features.
6September 18, 2018 18242Skip AheadPCMinor update.
No new features.
5September 12, 2018 18237Skip AheadPCMinor update.
Sign-in screen acrylic effect.
4September 6, 2018 18234Skip AheadPCMinor update.
No new features.
3August 16, 2018 18219Skip AheadPCMinor update.
No new features.
2August 10, 2018 18214Skip AheadPCMinor update.
No new features.
1July 25, 2018 18204Skip AheadPCMinor update.
No new features.

Windows 10 version 1809 Insider Preview build history

Dubbed Redstone 5, Windows 10 version 1809 (October 2020 Update) was the sixth major feature update released on November 13, 2018. Below you’ll find the history of the Windows Insider Preview builds released in the Fast, Slow, and Release Preview rings. The latest version available to Insiders in the Fast ring is Windows 10 build 17763, and build 17763 in the Slow ring.

Release dateBuild numberRingPlatform
October 30, 201817763.107Slow ring and Release Preview PC
October 16, 201817763.104Slow ring and Release Preview PC
October 9, 201817763.17Slow ring and Release Preview PC
September 20, 201817763Slow ringPC
September 18, 201817763Fast ringPC
September 18, 201817758.1004Slow ringPC
September 15, 201817760Fast ringPC
September 14, 201817758Slow ringPC
September 11, 201817758Fast ringPC
September 11, 201817754Slow ringPC
September 7, 201817755Fast ringPC
September 5, 201817754Fast ringPC
August 31, 201817751Fast ringPC
August 30, 201817744Slow ringPC
August 29, 201817738Slow ringPC
August 24, 201817746Fast ringPC
August 21, 201817744Fast ringPC
August 17, 201817741Fast ringPC
August 14, 201817738Fast ringPC
August 10, 201817735Fast ringPC
August 8, 201817733Fast ringPC
August 3, 201817730Fast ringPC
July 31, 201817728Fast ringPC
July 26, 201817713.1002Slow ringPC
July 25, 201817723Fast ringPC
July 23, 201817713.1002Fast ringPC
July 11, 201817713Fast ringPC
July 7, 201817711Fast and Skip AheadPC
July 2, 201817692Slow ringPC
June 27, 201817704Fast and Skip AheadPC
June 14, 201817692Fast and Skip AheadPC
June 6, 201817686Fast and Skip AheadPC
May 31, 201817682Fast and Skip AheadPC
May 24, 201817677Fast and Skip AheadPC
May 16, 201817672Fast and Skip AheadPC
May 9, 201817666Fast and Skip AheadPC
May 3, 201817661Fast and Skip AheadPC
April 25, 201817655Skip AheadPC
April 20, 201817650Skip AheadPC
April 12, 201817643Skip AheadPC
April 4, 201817639Skip AheadPC
March 30, 201817634Skip AheadPC
March 21, 201817627Skip AheadPC
March 16, 201817623Skip AheadPC
March 7, 201817618Skip AheadPC
February 14, 201817604Skip AheadPC

Windows 10 version 1803 Insider Preview build history

Version 1803 (April 2018 Update) was the fifth feature update of Windows 10 released on April 10, 2018. Below you’ll find the history of the Windows Insider Preview builds released in the Fast, Slow, and Release Preview rings for the Redstone 4 update development. The latest version available to Insiders is Windows 10 build 17134.

Release dateBuild numberRingPlatform
April 20, 201817134Release PreviewPC
April 20, 201817134Slow RingPC
April 16, 201817134Fast RingPC
April 5, 201817133Release PreviewPC
March 30, 201817133SlowPC
March 27, 201817133FastPC
March 23, 201817128FastPC
March 23, 201817127SlowPC
March 20, 201817127FastPC
March 16, 201817123FastPC
March 16, 201817120SlowPC
March 13, 201817120FastPC
March 9, 201817115SlowPC
March 6, 201817115FastPC
March 2, 201817112FastPC
February 27, 201817110FastPC
February 23, 201817107FastPC
February 14, 201817101FastPC
February 7, 201817093Fast and Skip AheadPC
January 24, 201817083Fast and Skip AheadPC
January 19, 201817074.1002Slow PC
January 19, 201817074.1002Fast and Skip AheadPC
January 12, 201817074Fast and Skip AheadPC
December 19, 201717063Fast and Skip AheadPC
November 22, 201717046Fast and Skip AheadPC
November 16, 201717040Fast and Skip AheadPC
November 8, 201717035Fast and Skip AheadPC
November 1, 201717025SlowPC
October 25, 201717025Fast and Skip AheadPC
October 13, 201717017Fast and Skip AheadPC
September 27, 201717004Fast (Skip Ahead)PC
September 13, 201716362Fast (Skip Ahead)PC
August 31, 201716353Fast (Skip Ahead)PC
July 26, 201716251Fast (Skip Ahead)PC

Windows 10 version 1709 Insider Preview build history

Windows 10 version 1709 (Fall Creators Update), internally known as Restore Store 3, was the fourth feature update. In the table below, you’ll find this history of all previews available for this release before it became available to everyone. The current available version is Windows 10 build 16299.15 for PC and Windows 10 Mobile build 15254.1 (Windows 10 Mobile Fall Creators Update candidate) for phone.

Release dateBuild numberRingPlatform
October 19, 201715254.1Release PreviewMobile
October 11, 201715254.1Fast/SlowMobile
October 10, 201716299.15Release PreviewPC
October 4, 201716299.15SlowPC
October 2, 201716299.15FastPC
September 28, 201716299SlowPC
September 26, 201716299FastPC
September 26, 201716296SlowPC
September 22, 201716296FastPC
September 22, 201715252SlowMobile
September 22, 201716291SlowPC
September 22, 201716296FastPC
September 20, 201716294FastPC
September 19, 201716291FastPC
September 15, 201715252FastMobile
September 15, 201716288SlowPC
September 14, 201715245SlowMobile
September 12, 201716288FastPC
September 12, 201715250FastMobile
September 1, 201716278SlowPC
September 1, 201716281FastPC
August 29, 201716278FastPC
August 25, 201715245FastMobile
August 25, 201716275FastPC
August 24, 201715240SlowMobile
August 23, 201716273FastPC
August 9, 201715240FastMobile
August 2, 201716257FastPC
August 2, 201715237Fast Mobile
July 26, 201716251Fast (rs3_release)PC
July 26, 201715235FastMobile
July 13, 201716241FastPC
July 13, 201715230FastMobile
July 7, 201716237FastPC
July 7, 201716232SlowPC
July 6, 201716232.1004FastPC
June 28, 201716232FastPC
June 28, 201715228FastMobile
June 21, 201716226FastPC
June 21, 201715226FastMobile
June 21, 201715223SlowMobile
June 13, 201715223FastMobile
June 8, 201716215FastPC
June 8, 201715222FastMobile
May 17, 201716199FastPC
May 17, 201715215FastMobile
May 11, 201716193FastPC
May 11, 201715213FastMobile
May 4, 201716188FastPC
April 28, 201715208FastMobile
April 28, 201716184FastPC
April 24, 201715207FastMobile
April 19, 201716179FastPC
April 19, 201715205FastMobile
April 14, 201716176FastPC
April 14, 201715204FastMobile
April 7, 201716170FastPC
Windows 10 Creators Update (Redstone 2)
April 25, 201715063.251Release Preview, Slow Mobile
March 29, 201715063SlowPC
March 29, 201715063.2SlowMobile
March 28, 201715063.2FastPC
March 20, 201715063SlowPC
March 20, 201715063FastPC, Mobile
March 17, 201715061FastPC
March 16, 201715060FastPC
March 14, 201715058FastPC
March 10, 201715055FastPC, Mobile
March 10, 201715051SlowMobile
March 8, 201715051FastMobile
March 8, 201715048SlowPC
March 3, 201715048FastPC
March 3, 201715047FastMobile
March 2, 201715043SlowMobile
March 1, 201715042SlowPC
February 28, 201715046FastPC
February 24, 201715043FastMobile
February 24, 201715042FastPC
February 8, 201715031FastPC, Mobile
February 3, 201715025SlowPC
February 1, 201715025FastPC, Mobile
January 27, 201715019FastPC
January 20, 201715014FastPC, Mobile
January 12, 201715007FastPC, Mobile
January 9, 201715002FastPC
December 8, 201614986FastPC
December 1, 201614977FastMobile
November 17, 201614971FastPC
November 16, 201614965SlowPC, Mobile
November 9, 201614965FastPC, Mobile
November 3, 201614959FastPC, Mobile
October 25, 201614955FastPC, Mobile
October 19, 201614951FastPC, Mobile
October 13, 201614946FastPC, Mobile
October 7, 201614942FastPC, Mobile
September 28, 201614936FastPC, Mobile
September 14, 201614926FastPC
August 31, 201614915FastPC, Mobile
August 17, 201614905FastPC, Mobile
August 11, 201614901FastPC

If you don’t know the version of Windows 10 your PC is running, you can use this guide to determine exactly the version of the operating system installed on your device.

Join Windows Insider Program

On Windows 10, using the Settings app, you can join your device into any of the three testing changes to get early access to new features and enhancements.

To join the Windows Insider Program, use these steps:

  1. Open Settings.

  2. Click on Update & Security.

  3. Click on Windows Insider Program.

  4. Click the Get started button.

    Join Windows Insider Program button
    Join Windows Insider Program button
  5. Click the Link an account button.

    Link an account option
    Link an account option
  6. Sign in with your Microsoft account.

  7. Click the Continue button.

  8. Under the “Pick your Insider settings” section, select the previews you want to test, including:

    • Dev Channel — Includes new features as soon as they’re ready, but builds are not stable.
    • Beta Channel — Includes new features and enhancements expected for the next version of Windows 10. The previews are more stable, but you may still run into issues.
    • Release Preview Channel — Includes the final version of Windows 10, minus some quality updates.
  9. Click the Confirm button.

    Select Insider channel
    Select Insider channel
  10. Click the Confirm button to agree to terms and conditions.

  11. Click the Restart button.

  12. Open Settings after the reboot.

  13. Click on Update & Security.

  14. Click on Windows Update.

  15. Click the Check for updates button.

    Windows 10 Insider Preview build download
    Windows 10 Insider Preview build download
  16. Click the Restart button.

Once you complete the steps, the latest preview build of Windows 10 available in the channel you selected will download and install on your computer.

Switch Windows Insider Program channel

You can always switch between channels to test different builds, but you can’t rollback to the current version of Windows 10 without reinstallation.

To switch Insider channels, use these steps:

  1. Open Settings.

  2. Click on Update & Security.

  3. Click on Windows Insider Program.

  4. Under the “Pick your Insider settings” section, select the active Insider channel – for example, Dev Channel.

    Windows Insider Preview settings
    Windows Insider Preview settings
  5. Select a different Insider channel of Windows 10.

    Switch Insider Preview Channel on Windows 10
    Switch Insider Preview Channel on Windows 10
  6. Restart your device.

  7. Open Settings after the reboot.

  8. Click on Update & Security.

  9. Click on Windows Update.

  10. Click the Check for updates button.

  11. Click the Restart button.

  12. After you complete the steps, the new build from the active channel you selected will download and install on the device.

  13. Stop Windows Insider Program builds

Although you can’t rollback to the current release of Windows 10 (unless you perform a clean installation), you can use an option to opt-out of the program, which will continue to download Insider builds, but once the final version is released, the device will gracefully be removed from the program.

Stop Windows Insider Preview builds

To stop getting Insider builds of Windows 10, use these steps:

  1. Open Settings.

  2. Click on Update & Security.

  3. Click on Windows Insider Program.

  4. Under the “Stop getting preview builds” section, turn off the toggle switch for the setting.

    Opt-out Windows 10 Insider Program
    Opt-out Windows 10 Insider Program

Once you complete the steps, the device will no longer receive Insider builds once the final version is installed.

Originally published in October 2020, information has been updated in October 2020, and it’ll be kept updated as new releases become available.