I've tried twice now to update to Windows 11. It gets through the initial download in Windows 10 just fine, but when it reboots and starts updating I get a BSOD: attempted write to readonly memory.
Rebooted, it failed and undid the changes. Tried again, same issue, but this time it attempted to recover the install, then failed. Repeated a few times (scaring the crap out of me, reinstalling OS is a pain) and finally undid the install like last time and it's back to normal.
I actually do want to try installing it, but only with the option to revert, so I'd really prefer it this method over a a fresh install.
See attached for screenshot.