Microsoft releases new Windows 10 21H2 and 21H1 Release Preview builds

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Late this afternoon Microsoft released two new Windows 10 builds to the Release Preview branch of the Windows Insider program. There’s both a new Windows 10 21H2 build, as well as a Windows 10 21H1 build available. Fixes are the same between the two releases.

On Windows 10 21H1, the build comes in at 19043.1319 (KB5006738.) Meanwhile, for Windows 10 21H2, the build comes in at 19044.1319 (KB5006738.) The fixes in both builds cover a wide range of issues from the out of box experience, VPN connections, Bitlocker, and more. We’ve included the full change log for you below.

  • We fixed an issue that prevents you from accessing the pre-provisioning page during the out-of-box experience (OOBE). This issue occurs when the credentials page for signing in to Azure Active Directory appears, and you press the Windows key five times.
  • We added a feature that facilitates certain cross-browser ata transfers.
  • We fixed an issue with Assigned Access kiosks that are configured with Microsoft Edge as a kiosk application. These kiosks might sometimes fail to restart Microsoft Edge if users close the browser window.
  • We fixed an issue in which the use of App-V intermittently causes black screens to appear when signing in on the credentials page.
  • We fixed an issue that might prevent subtitles from displaying for certain video apps and streaming video sites.
  • We fixed an issue that prevents Windows 10 virtual private network (VPN) users from connecting to Windows Server 2019 Routing and Remote Access service (RRAS) servers.
  • We fixed an issue that prevents Software-Defined Networking (SDN) virtual machines from working when you configure the Generic Routing Encapsulation (GRE) VPN bandwidth limitation.
  • We fixed a Primary Refresh Token (PRT) update issue that occurs when VPN users sign in using Windows Hello for Business when the VPN connection is offline. Users receive unexpected authentication prompts for online resources that are configured for user sign-in frequency (SIF) in Azure Active Directory-Conditional Access.
  • We fixed an issue that causes Windows to go into BitLocker recovery after a servicing update.
    We fixed an issue that might cause Kerberos.dll to stop working within the Local Security Authority Subsystem Service (LSASS). This occurs when LSASS processes simultaneous Service for User (S4U) user-to-user (U2U) requests for the same client user.
  • We fixed an issue in Code Integrity that might cause a memory leak.
  • We enhanced Microsoft Defender for Endpoint’s ability to identify and intercept ransomware and advanced attacks.
  • We fixed an issue in the OOBE that might cause Windows AutoPilot provisioning to fail.
  • We fixed an issue that prevents Kana input mode users from inserting a question mark (?) using the Shift-0 key combination.
  • We fixed an issue that sometimes causes the lock screen to appear black if you enable slideshow.
  • We fixed a reliability issue with LogonUI.exe, which affects the rendering of the network status text on the credentials screen.
  • We fixed an issue that causes Server Message Block (SMB) Query Directory Requests to fail when the buffer size is large.
  • We fixed a memory leak issue in lsass.exe on domain controllers in the forest root domain that occurs when you have multiple forests and multiple domains in each forest. The SID-Name mapping functions leak memory when a request comes from another domain in the forest and crosses forest boundaries.
  • We fixed an issue with the virtual machine (VM) Load Balancing feature, which ignores a site’s fault domain

Even though Microsoft is pushing out new Windows 10 21H2 builds, the company has not yet indicated when a release date for the next featured update for Windows 10 could be coming. For those who are not yet on Windows 11, we hope that we’ll be getting a Windows 10 21H2 release date soon. There aren’t many new features, but all of these 21H2 builds have now been focused on stability, so, happy downloading, Windows Insiders.

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