Title. I dual-boot Windows and Linux. I always saw people making “WINDOWS DELETED MY LINUX BOOTLOADER OMGOMG” posts and it had never happened to me. Now, the opposite has happened. I switched from EndeavourOS to OpenSUSE and now my windows install is no longer selectable on boot.
I keep Windows in a separate drive entirely, so instead of using grub, I use the EFI’s boot-select menu thingamafuck (look I don’t know jargon okay?) to choose Windows when I need it.
Well today it’s not there. Only the Linux entries show up. The Windows partition itself seems to be in good order, like, I can access it from within Linux no problem.
But yeah it doesn’t show up on my EFI selector thingie. I imagine I could get the EFI Shell going, but I have no idea how to use THAT either.
Your Linux install may be using the same EFI partition as your Windows disk, even though the filesystem is on another drive. Most installers prefer existing EFI partitions. You may have to modify your fstab file to use an EFI partition on your Linux drive instead, in which case they should remain separate and not mess with each other again.