Hello Win XP SP2 P4 2.4 GHZ Nvidia fx5200 128mb GPU 1Gb ram (2 x 512) 80gb ATA HDD My computer just randomly restarts itself with nor prior warning, there is no BSOD. I have scanned for viruses, spyware and done a registry fix. Just today i did a quick restore (which restored my system to when i first installed windows) but it is still restarting at random. The only recent change i can think of before this happened was that we bought a wireless router (although this computer is running on an Ethernet cable through one of its ports), and i removed an old dvd drive replacing it with a new one which isnt actually connected to my power supply. To try and fix this problem we have also bought a new power supply which was installed about 2 weeks ago.