I've spent the past three days trying to upgrade from Windows 10 to 11 and have been pulling my hair out trying to get it to go through. I initially started with using the Windows Installation Assistant, but it was never able to complete all the way through at the end. I have always been met at the very end with an "Undoing changes made to your computer". I've checked with the PC Health Check and I'm good, I've got plenty of storage left (202 GB), and I've also already ran as admin in a command prompt both;
DISM.exe /Online /Cleanup-image /Restorehealth
sfc /scannow
I've checked for any unknown devices in device manager and have checked for any driver updates. I've checked for Windows Updates and even ran the troubleshooter. I've also ran the upgrade through both C:$GetCurrent\media and using the ISO, while also unplugging every external device save for just my monitor so I can watch it. I have done all of these things and I'm still getting "Undoing changes made to your computer" however, after I started using the $GetCurrent and ISO options I've started to get a prompt after the upgrade fails now saying;
0xC1900101 - 0x40017
the installation failed in the SECOND_BOOT phase with an error during BOOT operation
I would also really like to not have to do a clean installation, requiring me to go through the process of backing up files before it wipes them all as well if possible. From what I've been able to gather from most advice I've seen elsewhere, there seems to be some driver error I'm getting, but for the life of me I can't tell what it might be. I would really love some help and if any other further information such as any kind of specs or logs are needed I would be more than willingly to update.