Yesterday my Pc began to reboot itself quite a bit. So I started with the basics, -tried another PSU -disconnected everything and reconnected it -clean for dust -re-seated memory -tried a different CPU/CPU Fan (both) What it does is boot up login in to windows and sits for about 20 secs. Then shuts itself down. It seems to "click" when it turns off but im not sure if thats just the PSU or if its the CPU. Specs are- HP d530c Desktop 2.66 gig intel 240 Watt PSU 1 gig ram ddr (4 256) AtI Radeon 9800 XT 40 gig HD 7200 80 HD 7200 not sure what the Socket # is....or motherboard type. Any help would be great!!! thanks!