How to handle a Windows login loop and BitLocker lock issue?

I feel for you, that sounds like a tough situation to tackle, especially if your mom can’t find the recovery keys. As for corrupted user profiles, they can occur due to software conflicts, improper shutdowns, or system updates going awry. Your best bet seems to be a full Windows reinstall, and if that doesn’t work, then a new drive is probably the way to go.

It sounds like that error and the login loop, along with the BitLocker lock, likely indicate a corrupted user profile or a broken recovery environment, rather than a dead NVMe drive. To access your files, you'll need the BitLocker recovery key—without it, recovering any data might be pretty much impossible. If you find the key, back up your data first and then perform a clean install, as repair installs often fail on BitLocker volumes when system files are damaged. If you keep experiencing the loop after the clean install, then a new drive might be necessary, though it seems like your hardware is still fine.