Over the last 3 weeks I have lost 13 motherboards to bios failure..... (bios config pages garbled) all of these boards are either ECS, Amptron or Shuttle (garbage in my opinion) with AMI bios's. Bios flashing doesnt help. There are other PC's on the network that have seized but a "clear CMOS" would clear up there problem. All total 20-25 PC's have seen this issue. I am running a 2k domain w/100+ PC's. All PC's are virus protected. Out of the 13 boards that failed completely 6 had the option enabled to either virus protect or write protect their bios's. In my 6+ years of managing this network I have seen allot of things but this one has me stumped. Is it a random thing? or is there a problem out there. One thing to note, We have a backup generator on the building (medical) once a month this is tested on a Saturday morning, the friday evening before I personaly shut down all PC and network equipment. It seems that in the days that follow this, I get failures, even though equipment was shut down. The last failure was a pc that was on a UPS. Any ideas or theorys would be greatly appreciated.