I'll do you one better. Do you know what a windows update killed on my multi boot system? It killed the windows bootloader. I'm working on a permanent solution to fixing this bootloader fudgery.
Pre-UEFI they were fighting over the boot sector, sure, but now that everything is more well defined, and every OS can read the FAT32 ESP? Never seen it...
At worst the UEFI boot entry is replaced. There are some really shitty UEFI implementations out there which only want to load \efi\microsoft\boot\bootx64.efi or \efi\boot\bootx64.efi, or keep resetting you back to those.
Assuming you were dumped into Windows suddenly, you can check if you have the necessary boot entries still with bcdedit and its firmware option
bcdedit /enum firmware
If you just have a broken order you can fix it with
bcdedit /set {fwbootmgr} displayorder {<GUID>} /addfirst
If you actually need a new entry for Linux it's a bit more annyoing, you need to copy one of the windows entries, and then modify it.
bcdedit /copy {<GUID1>} /d "Fedora"
bcdedit /set {<GUID2>} path \EFI\FEDORA\SHIM.EFI
bcdedit /set {fwbootmgr} displayorder {<GUID2>} /addfirst
Where GUID1 is a suitable entry from windows, and GUID2 is the one you get back from the copy command as the identifier of the new entry. Of course you will have to adjust the description and the path according to your distro and where it puts its shim, or the grub efi, depending on which you'd like to start.
Edit: Using DiskGenius might be a little more comfortable.
Never happened to me, but then again, most of the shit I see people complain windows does has never been my experience either.
I don't even boot windows anymore and it still takes over the first boot spot randomly.
I'd use a VM with GPU passthru
This is what I've been trying to accomplish. While I've been able to get it to work; I generally have relatively poor performance for gaming.
By chance do you game and have had enough success with the GPU pass through to play? What's your setup like?
My comment was more like a suggestion, I don't actually use Windows at all anymore since I finished school and thankfully I don't need it
Hint: :q!
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