I've been reading about this topic and was curious if anyone has been affected by BIOS infections or has had experience in recovering from the effects of a BIOS intrusion.
From what I've read, it seems this threat is rare among home PC users but I have read a few posts elsewhere where some have been hit by one of these BIOS infections.
One poster said that he had recovered from it by doing the following:
- Unplug the PC. Leave it unplugged for a period of time to insure that the RAM is completely cleared from all previous memory content.
- Remove the CMOS Battery/Cell on the MoBo to clear the BIOS / EEPROM.
- Power up the PC, then use the MoBo bootable media or a Flash Stick to re-flash the BIOS.
If this procedure would work in most cases, that would be good to know.
I have a backup .ROM file for my BIOS that's stored externally, That's all I can think of to prepare for such an intrusion.
My MoBo doesn't have a BIOS "write-protect" jumper on it. From what I've been reading about this recently, MoBo's used to have this jumper present on many boards but have gotten away from including that with recent manufacturers.