Initially my computer either kept restarting or freezing. It soon became more frequent so I checked the CPU fan. I noticed the fan wasn't moving. Now, however, the CPU fan is moving after a few weeks after I took the fan off and replaced it back again. My computer still restarts and freezes Does anyone know what the solution to my problem is? The CPU is a P3 @ 500 mhz with a SEC II cooler fan. Is this a hardware of software issue? What can I do to rule this out? I've had this issue of my computer restarting in the past however not freezing. My solution was to reformat my computer and it worked temporarily of course.