Windows Upgrade Help and more

Thanks! I made the USB, but when I try the repair install it says my drive is locked with BitLocker. I don't remember turning that on—what do I do?

Has anyone else had boot issues after trying to upgrade from Windows 10 to 11? My PC restarted, but now it just gets stuck on a black screen with a spinning circle. Sometimes it flashes a quick error—I think it said "INACCESSIBLE_BOOT_DEVICE"—before restarting again. I can't even get to the recovery ...