Two new builds are coming to Windows 10: 21H2 is now ready

These two updates are not going to bring major changes, improvements or news to the operating system, but are focused exclusively on correcting bugs and errors. In addition, despite being different versions, the differences between 21H1 and 21H2 in Windows 10 They are very small.

Next, we are going to see what are the errors that have been fixed in these two new versions of the operating system. The changes for both 21H1 and 21H2 are the same, so we will not distinguish between them.

Upgrade to Windows 10 21H2

Bug fixes for build 19043.1263 and 19044.1263

These are the changes that have been implemented in these Windows updates:

  • Fixed a bug that changed the Windows language when automating the Windows OOBE wizard.
  • Fixed an issue that caused the time to go wrong and incorrect due to a daylight saving time change.
  • Fixed a bug that caused the server manager app to disappear when used to remove Hyper-V roles in Windows Server 2022.
  • Fixed an issue when parsing time formats in event logs by excluding milliseconds.
  • Fixed a bug that caused the DnsCache service to put the CPU to 100%.
  • New feature for administrators: ability to configure default zoom in Microsoft Edge dialog boxes in Internet Explorer mode.
  • Fixed an issue with Windows WIA driver calls.
  • Fixed a bug that caused some programs, such as Outlook, to stop responding during normal use.
  • Fixed another bug in Outlook that did not let us see information when selecting the reply option.
  • Fixed an issue that did not save NumLock information after rebooting.
  • Fixed an issue when sharing the screen with Teams when content with DRM appeared on the screen.
  • Fixed a problem with the Windows screen drawing function.
  • Fixed an issue that could cause audio distortion in apps like Cortana.
  • Removed the 25 selector limit on IKE client-server key exchange.
  • Fixed an issue that prevented seeing the PIN dialog for the smart card when connected to a VPN.
  • Fixed a memory leak bug in lsass.exe not freeing the buffer. Another non-paged pool leak issue is also fixed in that same process.
  • Fixed an issue that prevents the xhunter1.sys driver from loading.
  • Fixed a bug that caused Windows to stop working when used with a code integrity policy without user mode rules.
  • Improved the performance of MsSense.exe when using the UDP protocol.
  • Fixed bugs and improved the stability of IME input systems, especially when working in remote desktop.
  • Fixed an issue that caused the News and Interests icons to appear blurry at certain resolutions.
  • Fixed a memory leak when working with explorer.exe.
  • Fixed an issue that caused LogonUI.exe to stop working.
  • Fixed an issue that caused News & Interests to appear in the context menu even when disabled.
  • Fixed an issue that caused the LsaLookupSids function to crash.
  • Fixed a bug that caused WebDav to stop working, and the entire system to stop responding.
  • Fixed a stop error after a system reboot.
  • Fixed a redirection problem from IE to Edge on websites configured for enterprise mode.
  • Removed a hyperlink that could cause the browser to stop responding.
  • Fixed an activation issue for input applications.
  • Fixed an issue that caused some applications to lose focus when the launch bar was not at the bottom.
  • Fixed a bug with PropertyGet in JScript9.dll.
  • Added new group policy PointAndPrint.

How to upgrade to Windows 10 21H2

The first of the builds, 21H1, is available to those Insider users who are enrolled in the Release Preview channel and are already using 21H1 of the operating system. On the other hand, the second of the compilations, 21H2, is currently only available to users of the “beta” channel who were moved to the “Release Preview” for not meeting the requirements for receive Windows 11 updates.

To install these updates, all we have to do is open the Computer Settings panel, go to Updates and security, and look for new versions of the software via Windows Update. Depending on our version of Windows, and the Insider level that we have, we can lower one or the other.

To check the version of Windows 10 that we are running, and the compilation number (or build) that we have, it will be enough to execute the command “winver” in the Windows search engine, or in the run window, to access this information.


We remind you that Windows 11 will reach all users who meet the requirements for free on October 5, 2021. In addition, although it is not yet confirmed, it is likely that the new Windows 10 update (the 21H2) also arrives that same day for all users who cannot (or want) to upgrade to the new Microsoft operating system.

If we don’t want to wait to test these changes, we can manually sign up for the Insider program, choose the channel Release Preview and, after restarting, download these new updates on our PC. Although there may still be bugs, being in such an advanced stage of development, it is likely that we will not encounter many more problems, and the user experience will be practically the same as the experience we will get when the final version comes out.

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