This post features solutions to fix An operating system wasn’t found error in Windows 11/10. This error prevents your Windows device from booting up properly ...
EDIT: It did - changing that setting back to "AHCI" resulted in a, "This operating system failed to start", message when I tried to boot XP. Changing the BIOS back to the "IDE" setting didn't fix that ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results