This is as weird as it can get, my PC has been encountering restart problem frequently in the last week or so. As usual I was suspicious of virus problems and memory but they were perfect. On inspecting the BIOS I figured no soon the system temperature reached 60 degrees (Fan revolving at 2800-2900r.p.m.) it restarts. Though this temperature should not hamper the normalcy as I have seen other PCs working at higher temperatures. What makes this happen?