Windows UpdateWindows 10/11 Update/Upgrade Failure Analysis The installation failed in the SAFE_OS phase with an error during BOOT operation - 0xC1900101 - 0x20017 Updated January 17 2025
The installation failed in the SAFE_OS phase with an error during BOOT operation - 0xC1900101 - 0x20017


If you check the logs, you may not see any clues.


I have had these symptoms many times. The fix is to run these commands to erase your EFI partition and rebuild it. Please read the other guide below for instructions on doing them. You will need to do this while the drive is not the active drive, I suggest a Win10 or Win11 USB Installer.

https://helpfultechnotes.com/guide/319


You first need to assign a drive letter to that EFI partition, the guide above shows some of the details for it. Then basically format the partition (which will be around 100-300MB in size), then run the bcdboot command to put the UEFI boot files back.
Search Keywords: Windows 10 Upgrade to Win11, Update, Feature Update




©2024 - Some portions of this website are Copyrighted.
Your IP: 18.222.15.173     Referring URL:
Browser: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
Terms and Conditions, Privacy Policy, and Security Policy