WinXP Freeze Help

My pc freezes randomly whenever i empty recycle bin. Most of the time it freezes when i empty recycle bin while im running cpu heavy application like games but sometimes it hangs when i only have web browser open.

The harddisk light stays on when the pc freezes. I have to reboot the pc by presssing the reset button because mouse and keyboard wont work as well.

I checked the harddisk for bad sectors and tried reinstalling winxp and installing it on another harddisk. Ran microsoft ram diagnostic as well. No problem there.

Sometimes the pc freezes randomly as well but most of the time it happens when i empty the recycle bin.

System temp = 45 Cpu temp = 65 when cpu being used heavily

Can it be heat issue ? or motherboard problem ?

I thought it might be the heat but it puzzles me why most of the time it freezes when i empty recycle bin.

I dont have norton stuff installed that protects the recycle bin. Fresh install of winxp with antivirus and spyware removal applications installed and one game.