For some time now every now and then when i start up my system in the morning the bios(1701) refuses to post and i am forced to restart the rig around 5-10 times before the bios(1701) will post and i can boot Vista. Also if i reset the bios(Remove the battery or by jumper) the system posts the bios and then prompts me with "USB Over Current Detected System will Restart in 15 Seconds". I can get round this by turning of the error reporting in the bios and then rebooting the system, then everything works fine, stable for days. Can anyone tell me if the problem with the system posting the bios is a power related issue? The PSU i am now using is only a Trust 570W Generis PSU. Or could it be the USB Over Current detected that is causing my rig not to start/post bios? I am installing a Corsair 650W PSU tomorow along with a new GTX275 GFX card and hope this will disapeer the problems. Any/all help welcome. My specs(Current) E8500 3.16Ghz, ASUS P5N32-E SLI, ASUS EN9600GT, 4Gb DDR2 677Mhz, Trust 570W PSU,Artic Frezzer Pro 7 fan.