About twice a day everyday my computer completely locks-up. The screen becomes frozen and the only way to recover is to physically turn off the power button and reboot. Ctrl-alt-del doesn't even work when i get the lock-up. It seems to happen randomly, while on the internet, while using programs, while doing nothing, and even sometimes during system scans. I followed most of the instructions on the "Follow these instructions BEFORE posting your HJT log." and i managed to "fix" a few of the problems in my HJT scan but would like to know if i need further fixing. I have windows millenium so was unable to get an Ewido scan but i was able to get a scan from TrojanHunter and most of the other programs that you listed.