Hi, Im new here and I have a problem, my computer has been restarting itself for a week or two. I bought a new graphic card and a power supply. I have a 4870 radeon 512 vram Powercolor, AMD 64 2x 2,2 ghz, 2 GB Kingston 667 mhz. DDR2, the power supply is, i dont remember but its 450 watt and my hard drive is 2,5 250gb some thing like that. Just after I came from vacations I installed my new power and graphics, but just day after my motherboard died... KN9 Sli platinum, and I buyed a new one MSI K9A2 CF and it was all fine for some time then it started to restart randomly after 5 minutes some times just after few seconds the windows booted and sometimes it lastes few days. I tried reinstalling windows a few times and even without any drivers installed it restarts. I checked my cpu heat with the SpeedFan program and its just around 35 so I guess its good, I tried takinnsg out one ram stick and the other, still no effect. I am not writing this on my computer because when I tried it restarted after I wrote the first line, and uhh I dont know what this could be, Windows bad installed? but I reinstalled few times and it still was the same, no ram error, the cpu heat is good, Hard drive? dont know maybe my new power supply? Why did my last motherboard die? Maybe my 4870 radeon? Some people said that firefox can restart computer I have firefox 3.03 and Internet Download Manager 5.11 Maybe Download manager or what? Im soo getting nervous of my pc and also I see it restarts more often when I am using internet (Firefox) then playing games(Spore, SAMP, BF2) I tried Avast, Ad Aware, Kaspersky 2009 My lastest antivirus and nothing... Please help!