Windows 10 update KB5027215

Windows 10 build 19045.3086 (KB5027215) outs for version 22H2, 21H2

Microsoft releases the June 2023 update for Windows 10 22H2 and as the last rollout for 21H2 since it has reached the end of support.

  • Microsoft releases update KB5027215 as a preview for Windows 10 22H2 and 21H2.
  • The update bumps the version number to build 19045.3086 and 19044.3086.
  • The update KB5027215 introduces security fixes and improvements.
  • This is the last update that the company is rolling out for version 21H2.

Microsoft is rolling out the update KB5027215 for Windows 10 22H2 and version 21H2 in the Stable Channel with security fixes and changes.

According to the announcement from the official website, the update KB5027215 bumps the version number to build 19044.3086 (21H2) and 19045.3086 (22H2) and fixes a known issue that affects 32-bit apps that are large address aware and use the CopyFile API and a problem with the Windows Kernel.

In addition, this Patch Tuesday update includes the non-security fixes and improvements that the company made available on May 23 with the update KB5026435, which improves the Windows Search experience, and now shows up to three priority for notifications at once. The update also releases a slew of problems regarding Server Message Block (SMB), Local Security Authority Subsystem Service (LSASS), Storage Spaces Direct (S2D) cluster, Windows Firewall, Azure Active Directory (Azure AD), Windows Defender Application Control (WDAC) policies, and more.

Finally, Microsoft is also noting that starting on June 13, 2023, Home, Pro, Pro Education, and Pro for Workstations editions of Windows 10 21H2 have reached the end of servicing. This means that after this Patch Tuesday rollout, version 21H2 will no longer receive maintenance or security updates. If you’re still in version 21H2, it’s recommended to update to Windows 10 22H2, or you can also upgrade to Windows 11 22H2.

Windows 10 update KB5027215

These are the fixes and improvements rolling out in May 2023 for Windows 10:

  • This update addresses a known issue that affects 32-bit apps that are large address aware and use the CopyFile API. You might have issues when you save, copy, or attach files. If you use some commercial or enterprise security software that uses extended file attributes, this issue will likely affect you. For Microsoft Office apps, this issue only affects the 32-bit versions. You might receive the error, “Document not saved.”
  • This update addresses an issue that affects the Windows Kernel. This issue is related to CVE-2023-32019.
  • Brings back an improved search box experience on the Windows 10 taskbar. If you have a top, bottom, regular, or small icons taskbar, you will see the search box appear. You can use it to easily access apps, files, settings, and more from Windows and the web. You will also have access to the latest search updates, such as search highlights. If you want to restore your previous search experience, you can do that easily. To do that, use the taskbar context menu or respond to a dialog that appears when you use search.
  • Displays up to three high priority toast notifications at the same time. This feature affects apps that use Windows OS notifications to send notices for calls, reminders, or alarms. Up to four toast notifications might appear at the same time. This means that there can be three high priority notifications and one normal priority notification.
  • Addresses an issue that affects App Installer. Sometimes, MSIX apps fail to update.
  • Addresses an issue that affects Server Message Block (SMB). You cannot access the SMB shared folder. The errors are, “Not enough memory resources” or “Insufficient system resources”.
    Addresses an issue that affects the Local Security Authority Subsystem Service (LSASS). It stops working. This occurs when you use Azure Virtual Desktop (AVD).
  • The update addresses an issue that affects scheduled tasks. The tasks fail when they use stored local user account credentials. This occurs when you enable Credential Guard. The error message is “2147943726 : ERROR_LOGON_FAILURE (The username or password is incorrect).”
  • Addresses an issue that affects the Storage Spaces Direct (S2D) cluster. It might not come online.
  • This occurs after a periodic password rollover. The error code is 1326.
  • Addresses an issue that affects access to Tab settings for IE mode sites.
  • Addresses an issue that affects dot sourcing. It fails files that contain class definition in Windows PowerShell.
  • This update changes the support phone number for Microsoft India for Windows activation.
  • Addresses an issue that affects the PublishDfsRoots policy. It does not apply correctly to a targeted client that has mobile device management (MDM). One example of MDM is Microsoft Intune.
  • This update changes the international mobile subscriber identity (IMSI) ranges for certain mobile providers.
  • Addresses an issue that affects the Windows Firewall. The firewall drops all connections to the IP address of a captive portal. This occurs when you choose the Captive Portal Addresses option.
  • Addresses a multi-function label printer issue. It affects the installation of some of them.
  • Addresses an issue that affects devices that are joined to Azure Active Directory (Azure AD). The Windows Firewall cannot apply the correct domain and profile for them.
  • Addresses an issue that affects signed Windows Defender Application Control (WDAC) policies. They are not applied to the Secure Kernel. This occurs when you enable Secure Boot.
  • Addresses an issue that affects the touch keyboard. Sometimes, it does not show the correct layout based on the current input scope.
  • Addresses an issue that sometimes fails to open the touch keyboard.
  • Addresses an issue that might affect a large reparse point. You might get a stop error when you use NTFS to access it. This issue occurs after a canceled FSCTL Set operation changes the reparse tag.

Older versions of Windows 10

The company is also rolling out the update KB5027222 for version 1809, bumping the build number to 17763.4499, and pushing new fixes and improvements.

Furthermore, Windows 10 1607 received the update KB5027219 that bumps the version to build 14393.5989, and it addresses several problems. Finally, Windows 10 1507 is getting the update KB5027230 which increases the version to build 10240.19983 and addresses one security issue.

Download update KB5027215 for Windows 10

The update is available immediately and will download and install automatically through the Stable Channel. However, you can always force the update from Settings Update & Security > Windows Update, click the “Check for updates” button, and use the option to install the optional update.

About the author

Mauro Huculak is a Windows How-To Expert who started Pureinfotech in 2010 as an independent online publication. He has also been a Windows Central contributor for nearly a decade. Mauro has over 14 years of experience writing comprehensive guides and creating professional videos about Windows and software, including Android and Linux. Before becoming a technology writer, he was an IT administrator for seven years. In total, Mauro has over 20 years of combined experience in technology. Throughout his career, he achieved different professional certifications from Microsoft (MSCA), Cisco (CCNP), VMware (VCP), and CompTIA (A+ and Network+), and he has been recognized as a Microsoft MVP for many years. You can follow him on X (Twitter), YouTube, LinkedIn and Email him at [email protected].