I have a network (Workgroup) that has 6 computers. At about the same time 2 computers started acting slow and locking up. They both run Win XP. I have run UBCD disks on both for memory and hard drives. On the hard drives (Seagate) it says that there may be a firmware update available. I ran Combfix, Hitman Pro and Malwarebutes to remove malware (There was some, not a large amount). I then tried to run a repair with two different Windows XP cds . I get blue screens about 2 mins into trying to run the CDs. I put a new hard drive in and I get a blue screen at the same location. Any ideas?