Windows 10 update KB4093105

Windows 10 update KB4093105 (build 16299.402) releases

Windows 10 gets massive cumulative update to address a number of issues with the Fall Creators Update — Here's all you need to know.

Microsoft is releasing update KB4093105 for Windows 10 version 1709 (Fall Creators Update) outside of its regular schedule to address a slew of issues. This is the second out-of-band update the company is issuing for PCs in April. Previously, KB4093117 and KB4093120 released for Windows 10 version 1703 and version 1607 respectively.

KB4093105 bumps the version number of Windows 10 to build 16299.402, and while it doesn’t offer any new features, you’ll find a long array of patches that fix many app related problems, authentication using Windows Hello, BitLocker, Microsoft Edge, and much more.

What’s new with Windows 10 build 16299.402

Microsoft has announced KB4093105 at the Windows support site, and it’s referred as “April 23, 2018—KB4093105 (OS Build 16299.402)”. If you’re already running the Windows 10 Fall Creators Update on your PC, this update will only address these issues:

  • Addresses an issue in which running an application as an administrator causes the application to stop working when pasting the user name or password into the user elevation prompt (LUA).
  • Addresses an issue that causes Skype and Xbox to stop working.
  • Fixes a problem that prevents Autodiscover in Microsoft Outlook 2013 from being used to set up email accounts when UE-V is enabled.
  • Addresses an issue where AppLocker publisher rules applied to MSI files don’t match the files correctly.
  • Fixes a problem that causes updates for large game apps to fail.
  • Addresses an issue that removes user-pinned folders or tiles from the Start menu in some cases
  • Fixes a problem that causes invisible apps to appear in the Start menu.
  • Addresses an issue that might cause some users to experience unexpected panning or scrolling in certain apps while using the pen.
  • Fixes a problem that prevents Windows Hello from generating good keys when it detects weak cryptographic keys because of TPM firmware issues.
  • Addresses an issue that prevents users from unlocking their session and sometimes displays incorrect user-name@domain-name information on the logon screen when multiple users log on to a machine using fast user switching.
  • Fixes a problem that causes the browser to prompt for credentials often instead of only once when using the Office Chrome extension.
  • Addresses an issue related to smart cards that allow PINs or biometric entry. 
  • Increases the minimum password length in Group Policy to 20 characters.
  • Fixes a problem that displays name-constraint information incorrectly when displaying certificate properties.
  • Addresses an issue that blocks failed NTLM authentications instead of only logging them when using an authentication policy with audit mode turned on.
  • Fixes a problem that generates a certificate validation error 0x800B0109 (CERT_E_UNTRUSTEDROOT) from http.sys.
  • Addresses an issue resetting the Windows Hello PIN at the logon prompt.
  • Fixes a problem with the right-click context menu for encrypting and decrypting files using Windows Explorer is missing.
  • Addresses an issue that suspends BitLocker or Device Encryption during device unenrollment instead of keeping the drive protected.
  • Fixes a problem that causes Microsoft Edge to stop working after a few seconds when running a software restriction policy.
  • Addresses an issue that may cause a file system mini-filter to fail to unload because of a leak in Filter Manager.
  • Fixes a problem that occurs when a user with a roaming user profile first logs on to a machine running Windows 10, version 1607, and then logs off.
  • Addresses an issue that causes the cursor to unexpectedly move to center of the screen when changing the display mode.
  • Addresses a potential leak caused by opening and closing a new web browser control.
  • Fixes a problem that causes the ContentIndexter.AddAsync API to throw an unnecessary exception.
  • Addresses an issue with the first launch performance of UWP Desktop Bridge apps.
  • Fixes a problem with the Search tab of Microsoft Outlook 2016 during the upgrade from Windows 10, version 1703, to Windows 10, version 1709.
  • Addresses an issue that causes the connection bar to be missing in Virtual Machine Connection (VMConnect).
  • Fixes a problem that prevents certain devices from working on Windows 10, version 1709, machines when the “Disable new DMA devices when this computer is locked” Group Policy is active.
  • Addresses an issue that might cause Windows Server 2016 Domain Controllers to log Microsoft Windows Security audit events ID 4625 and ID 4776. 
  • Fixes a problem in which users may exist in a domain that is trusted using transitive trust, but are unable to locate a PDC or DC for the Extranet Lockout feature.
  • Addresses an issue that prevents you from modifying or restoring Active Directory objects that have invalid backlink attributes populated in their class.
  • Fixes a problem that prevents the AdminSDHolder task from running when a protected group contains a member attribute that points to a deleted object.
  • Addresses an issue that occurs when Volume Shadow Copy is enabled on a volume that hosts a file share.
  • Fixes a problem that makes a Japanese keyboard unusable in remote assistance sessions.

How to download the April 23 update for Windows 10

Windows 10 build 16299.402 (KB4093105) for PCs is available immediately. The new update will download and install automatically, but you can always force the update from Settings > Update & Security > Windows Update and clicking the Check for updates button.

It’s worth noting that this patch contains a few known issues that you should be aware of before installing. (For more details check the Windows support site using the link mentioned above.) You can find more details about the most recent updates in the Windows 10 update history tracker guide.

You can download this update directly from Microsoft using these links:

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].