FIX: Windows 10 Upgrade Assistant is stuck at 99%

There is no doubt that Windows is a very sensitive operating system when it comes to facing errors. Windows 10 upgrade assistant getting stuck at 99% is one of the many errors found in Windows 10. If you were confronted by this error and so looking for a solution then this article is your ultimate guide to fix the error.

Photo by Andrea Piacquadio

How to fix the Windows assistant stuck at 99%?

Unplug external devices:

So you may have different external devices plugged in your computer for various reasons, for example, a USB drive to store files. However, sometimes these external devices tend to interfere with the system and cause errors. Therefore you should consider unplugging all the external devices and see if the issue persists.

Disable your antivirus:

Some of your antivirus features may be intervening in your system and so causing the error. So it would be best if you considered disabling some of your antivirus features for a while or a better solution is to install more compatible and better antivirus software that won’t cause such errors in the future.

Restart Windows Update Service:

  • Open the Services window
  • Then navigate to Windows Update Service
  • Now right-click on it and select Stop
  • Next, repeat the step to restart the service by selecting Start


We will be happy to know your feedback about how well this article assisted you in fixing the error so kindly leave a comment down below.

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