I had OSes on separate disks. Win7 and Arch, used UEFI to choose who to boot. Updated to Win10 and it somehow completely broke Linux boot. I could choose on UE

I had OSes on separate disks. Win7 and Arch, used UEFI to choose who to boot. Updated to Win10 and it somehow completely broke Linux boot. I could choose on UEFI to boot Linux but it wouldn't work. Eventually I gave up and reinstalled Linux