Got a message a week ago that svchost.exe is a corrupt file, then went to a blue error screen. The cpu was very loud. Ran my spyware terminatot, found some files labeled rootkit, deleted them. Computer was very sluggish. Throughout the week I downloaded Avast, ran several scans and found trojans, spyware, etc. Then got AVG and it found several Win32/heur's-though for some reason the last scan I did claims 'locked file; could not be tested' for alot of files(see log). Keep getting corrupt file messages from yellow sign in taskbar, like the original message--they say to run chkdsk but I cannot use the fix parameter because 'the system can't be locked: in use by another program'. So....I've been running scans all week with some success but still have prob's. I went through the 8 steps thoroughly and have attached logs. CPU: Dell Optiplex GX270; Win XP,sp3; Pentium 4, 3GHz; 640 Mb RAM; 30 GB hard drive. Thanks.