Windows 10: Windows 11 upgrade failed

We have a dental client with several PC's failed on Windows 11 upgrade. Tried with upgrade through Datto RMM, Windows updates, Microsoft update assistant and ISO file as well.Windows 11 readiness check showed that all devices are Capable for upgrade.Any suggestions and help will be much Appreciated.

:)

 

Upgrading to windows 11

I have a few questions about windows 11...

1. How many GB it is? when my pc suggested the upgrade yesterday, it said it's about 4GB just want to be sure.
   
2. I'm using a windows 10 pro so if I upgrade, will it upgrade to a windows 11 pro?
   

 

Windows 11 upgrade failed.

Thanks.

The BCD or the EFI boot partition's file system is corrupt. Rebuilding the EFI boot partition fixes this issue.

Please go through these links for more information:

• How to Rebuild the EFI Boot Partition, BCD and Boot Files
  
• Windows 11 does not install. - Microsoft Community
  

If you need step-by-step assistance in this regard, boot into WinRE Command Prompt.

Then run:

• mountvol y: /s
  
• bcdedit
  
• diskpart
  
• list vol
  

For each command, photograph the screen and upload it to OneDrive.

 

Ssd upgrade

What do you mean "no good"? At which step did it fail?