Windows 10: Unable to upgrade to Windows 11 from legit Windows 10 copy, error code 0xC1900101

Hi!I've been trying to upgrade my Windows 10 Pro to W11 using the Upgrade Assistantdirectly downloaded from MS for hours now, but after multiple attempts, I keep getting the 0xC1900101 error code after waiting nearly an hour each time. Assistant finishes the 3 steps, reboots, blue install screen comes, percentage goes up normaly with time, then another reboot, and I get the installation has failed message, and then shortly after the 0xC1900101 code in the assistant.I tried running sfc scannow, chk dsk, etc. commands, nothing helps. Every driver and BIOS is up to date, system SSD has more tha

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windows 11 upgrade error code 0xc1900101

What is windows 11 upgrade error code 0xc1900101

 

Windows 11 upgrade fails error code (0xC1900101)

finally solved after lots of tries:

• remove other users on computer.
  
• download & install lenovo drivers for win 11 from lenovo site.
  

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• remove antivirus
  
• uninstall unneeded software
  
• run check disk command (chkdsk)
  
• unplugged any devices during win 11 upgrade
  
• run Reset_Reregister_Windows_Update_Components.bat
  
  https://www.tenforums.com/tutorials/24742-reset-windows-update-windows-10-a.html
  
  Redirecting
  
• run SetupDiag to check your error code:
  https://docs.microsoft.com/en-us/windows/deployment/upgrade/setupdiag
  
  more things i done: How to fix Windows 11 upgrade error 0xC1900101 – 0x60016?
  
  • disable network adapters
    
  • check for faulty drivers
    
  • uninstall virtual box
    
  • Run Windows Update Troubleshooter
    

 

0xC1900101 - 0x30018 Error Upgrading to Windows 10

Some suggestions from Microsoft for 0x30018....

and...

Microsoft | Resolve Windows 10 upgrade errors : Technical information for IT Pros