Windows Upgrade Help and more

I had this issue on my laptop. From what I have seen, that specific error is often tied to a driver or background app conflict. I finally got it to work by doing a clean boot to disable all non-Microsoft startup items and services before running the upgrade again.

Has anyone else had the upgrade from Windows 10 to 11 fail repeatedly? My PC meets the requirements, but the installation gets to about 85% and then rolls back with the error code 0xC1900101. I’ve run the Update Troubleshooter and made sure my drivers are updated, but it keeps happening. What other recovery options should I try before doing a clean install? I really want to avoid wiping everything if possible.

+1 You could also try temporarily disabling your antivirus, as that sometimes interferes with the upgrade process.

Have you tried temporarily disabling any third-party antivirus software during the upgrade?

Same here. Yeah, that's a good call—also, have you checked if there's enough free space on your system drive?

This happened to me. I finally got it to work by temporarily disconnecting all my external drives and USB peripherals except the mouse and keyboard.

Worked perfectly, thank you!

Agreed, that error's a pain. Try temporarily disconnecting any non-essential USB devices before starting the upgrade again.

Also, check if you have any third-party antivirus software running and try disabling it for the upgrade.

Same here. Agreed, that's a common culprit. Also, try temporarily disconnecting any non-essential USB devices, as they can sometimes interfere.