Hi there,
It's possible that the changes made to the bootloader by the Linux installations are causing issues with the Windows update process. Here are some troubleshooting steps you can try to fix the issue:
1. Use the Windows bootable USB drive to repair the bootloader:
- Create a Windows 11 bootable USB drive if you don't have one already.
- Boot your computer using the bootable USB drive and choose "Repair your computer" > "Troubleshoot" > "Advanced options" > "Command Prompt".
- Enter the following commands in order to repair the bootloader:
```
bootrec /fixmbr
bootrec /fixboot
bootrec /scanos
bootrec /rebuildbcd
```
- Exit the Command Prompt and try running the Windows update again.
2. Use System File Checker (SFC) to repair any corrupted system files:
- Open Command Prompt as an administrator.
- Enter the command `sfc /scannow` and wait for it to complete.
- Restart your computer and try running the Windows update again.
3. Disable Secure Boot in your BIOS settings:
- Restart your computer and enter the BIOS settings by pressing the appropriate key (often F2 or Del).
- Navigate to the Boot tab and disable Secure Boot.
- Save the changes and exit the BIOS settings.
- Try running the Windows update again.
Hopefully, one of these solutions will help fix the issue without having to reinstall Windows. Let me know if none of these work and we can explore other options.