Windows Upgrade Help and more

Has anyone else had the upgrade from Windows 10 to Windows 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 it didn’t help. What are my options to finally get this to work, short of a clean install? I really want to keep my files and apps.

That error is a real pain and usually points to a driver or software conflict. Your best bet is to manually update all your drivers, especially chipset and graphics, then temporarily disable any third-party antivirus before trying the upgrade again.

I had the same problem. For me, it was an old VPN client that was causing the rollback every single time.

Yeah, This happened to me. I finally got it to work by using the Media Creation Tool to do a clean install instead of the in-place upgrade.

Same here. You could also try temporarily disabling any third-party antivirus software, as that's another common blocker for these upgrades.

Yeah, that antivirus tip is a good call. Also, double-check you have at least 64GB of free storage, even if you meet the minimum—Windows can be picky about that during the upgrade.

This. I had the same problem. For me, it was a conflict with an old driver for my graphics card that finally let it go through after I updated it.

Just tried this - works great!

Agreed. Yeah, that method usually does the trick. One extra tip: temporarily disconnect any non-essential USB devices before starting the upgrade, as they can sometimes interfere.

Can confirm. Also, double-check that you have enough free space on your C: drive, as that can cause rollbacks too.