What is Windows update error 0x80071a91? How do I fix it?

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Home » Fix » What is Windows update error 0x80071a91? How do I fix it?

Some time ago, we have shared with you some tips that you could follow in order to fix errors during the Windows 8.1 Update installation which failed for some with various error codes. Speaking of update errors, all Windows versions are affected by update issues, including Windows 10, the latest OS version. Microsoft already acknowledged one of these errors and has released an official fix for it – hallelujah!
0x80071a91 Error fix windows 8.1
Many have been hit with various errors during the install of the latest Windows 8.1  or Windows 10 Update or after it was already deployed, such as slowing down of the computer or the fact that it erases saved games. So, now, Microsoft has come up with a patch that’s been released via the Windows Update or available for download online in order to fix this error. Here’s how it is officially described:

When you install update 2919355 by using Windows Update in Windows RT 8.1, Windows 8.1, or Windows Server 2012 R2, the installation fails with error code 0x80071a91.

Fix error 0x80071a91

1. Uninstall KB2919355

One of the fixes that seemed to work for those affected by various glitches during the install of the Windows 10, 8.1 Update was to uninstall the KB files and then try to perform a Clean Boot install. But the patch released by Microsoft doesn’t uninstall the update in cause – KB2919355, but just patches it so that errors will no longer appear and the system would run smooth. Besides Windows 8.1, Windows RT 8.1, Windows Server 2012 R2 Datacenter, Windows Server 2012 R2 Standard, Windows Server 2012 R2 Foundation, Windows Server 2012 R2 Essentials, Windows 8.1 Enterprise and Windows 10 are also affected by this bug.

2. Run the Windows Update Troubleshooter

Error 0x80071a91 usually occurs during or shortly after you installed the latest updates on your computer. Fortunately, Windows 10, Windows 8.1 features a built-in troubleshooter that can help you fix general update issues — and hopefully it will fix error 0x80071a91 as well.

  1. So, launch Control Panel > type ‘troubleshoot’ in the search box located in the upper right-hand corner
  2. Click on View All to list all the troubleshooters
  3. Select the Windows Update troubleshooter and run itwindows update troubleshooter control panel
  4. Wait until the process completes, restart your computer and check if the error persists.

After you have installed the patch, you will have to restart in order to see the changes take place. Let us know if this has helped you fix the problems, if not, detail in the comment your issue and we’ll try to solve it together.

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Editor’s Note: This post was originally published in April 2014 and has been since updated for freshness, and accuracy.

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