This problem started the other day when I attempted to run task manager. I got the error "windows could not locate c:/windows/system32/taskmgr.exe". The same happened for other system tools such aas msconfig. I checked in system32 and they were there. I tried to do rootkit scans but all the .exes I tried to open came up with the same errors as the task manager except the directory was for whatever folder I downloaded to. MalwareBytes or Avast couldn't detect anything. I think my BIOS is corrupted. I got a message telling me to restore to my backup bios. I then went on it today again and after exiting the bios I got a Blue Recovery message (not a BSOD) saying I had a 0xc000009a error and I needed to use recovery tools. The PC then turned off. It didn't happen again. I know these types of rookit infections are rare enough, even almost impossible for it to infect the BIOS. Originally, I planned to just wipe my drives but because I think it may be on the BIOS chip, if I am right in saying so, a reformat will do nothing. I have tried sfc/scannow in the Recovery mode but I get the error "Windows Resource Protection could not perform the requested operation".
I know how incredibly rare BIOS infections are and how they nowadays have to be designed to target a particular UEFI but I have read that my board isn't a very stable one...I have got a disc to reinstall Windows on but I don't want to do it only for the rootkit to come back.
Also, if I want to flash the BIOS, how can I do that without infecting my USB stick?
I can't really get a new motherboard for it as the 1150 boards are no longer around for decent prices (at least the good ones aren't). Could you advise me on where I should go from here?
My specs are
Gigabyte Z97 D3H
i5 4460 3.2GHZ
GTX 750 Ti ASUS 2GB (OC edition)
1x8GB 1600mhz HyperX FURY RAM
EVGA W1 500W PSU