If there are multiple drives installed in the computer, then it can create confusion as to which drive has a Bootloader. This scenario usually happens when Master Boot Record is on the wrong drive.

Hi.. I'm currently back on macOS but ran Ubuntu 20.04 on my iMac for ~4 months exclusively. As in no macOS install at all. Purely Ubuntu. At least once a month, my boot disk would revert to read only.

Windows 8 has the ability to create a bootable USB flash recovery drive that can be used to troubleshoot a Windows 8 computer that is unable to start. A recovery drive is the same as a startup repair ...

I think I might need a recovery sort of disc for my relative just in case, but this is for an HP box that only came with the wipe&reimage kind of "recovery" disc.<BR><BR>Or should I just make a copy ...