Tell me if you are willing to replace parts till we find it.
I have a Compaq Presario running Win98 w/256mb ram that's about six years old. It's been locking up / blue screen crashing and sometimes doing a complete reset all on it's own. It finally got so bad I did a full restore. Two days later, same thing. I have F-Prot virus scanner and Sygate firewall installed so I'm assuming no bugs. Opened the chassis and cleaned the cooling fins this morning, thirty minutes later - shutdown! Is there a computer activity logging program that I can have running in the background to catch what is happening when the machine shuts off by itself? I don't need a keylogger - I'm the only one using the machine so I know what keys I'm pushing. One other thing, seems to happen most often when online - hard to say for sure because that's where I spend 95% of my pc time.