I installed qubes on my Windows computer a couple of months ago, and I shrank the Windows parition to make room for qubes.
I can’t recall exactly why, but I ended up changing the BIOS setttings to legacy boot from UEFI.
Recently, I had a need to boot Windows (I know this is not considered a good idea). But when I switched back to UEFI, the BIOS cannot find any medium to boot off of.
I thought I had tested booting into Windows after installing qubes, but I am actually not sure.
So the main reason I am posting this is: does this sound like a possible cause for concern that the BIOS had been infected?
It would be nice to be able boot into Windows (to test external hardware that I cannot get working with qubes) but my main concern is a possible security breach.