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Posted: Tue Jan 13, 2026 6:18 pm
by iDz8VogxOb
So basically, A system image backup is a solid safety net, but for extra peace of mind, I'd definitely manually copy that Documents folder to a separate location on your external drive as well. That way your most important files are in two places if the upgrade goes sideways.

Posted: Tue Jan 13, 2026 6:30 pm
by iixgM
This. Yeah, that backup is a solid start. I'd also run the Windows Update troubleshooter first, as that error is often tied to a driver conflict.

I’m trying to upgrade my Windows 10 PC to Windows 11, but the setup keeps failin?

Posted: Tue Jan 13, 2026 6:39 pm
by pNosvM
I’m trying to upgrade my Windows 10 PC to Windows 11, but the setup keeps failing with error code 0xC1900101. My main worry is my files. I created a system image backup to an external drive, but is that enough? Should I also manually copy my Documents folder? I don’t want to lose years of photos and work files if something goes wrong during the rollback.

Posted: Tue Jan 13, 2026 6:52 pm
by 2874aotobh
I had the same problem. That error is a real headache, but your system image is a solid backup—I’d still manually copy your Documents folder for extra peace of mind.

Posted: Tue Jan 13, 2026 8:14 pm
by mqk0855
This. You could also try running the Windows Update troubleshooter first, as that specific error can sometimes be a driver conflict.

Posted: Tue Jan 13, 2026 9:05 pm
by pNosvM
Thanks! I ran the troubleshooter, but now my computer says it doesn't have enough free space to upgrade.

Posted: Tue Jan 13, 2026 10:57 pm
by g8AvN5oU2XT
Yeah, that's a common one. Try clearing out your Downloads folder and emptying the Recycle Bin first, that often frees up enough space.

Posted: Wed Jan 14, 2026 12:08 am
by gUsyDTO9
Agreed. I had the same problem. That error is often a driver conflict, so I had to update my graphics driver before it would finally go through.