Ga-EX58-UD4P Problem

[jcx]

Hi, i just build a new system and for some reason my computer suddenly boots at when i'm windows (vista 64bit)
it does this if i'm usin any program, IE or Firefox it just suddenly boots the computer with out any warning, but if i wont use any programs and just let vista be idle it wont crash 

my specs are: Ga-EX58-UD4P, I7 920, Nvidia geforce 260gtx, kingstons 1066Mhz 3x2 (6Gb) memory

i havent tried any overclocking with this system.

[oggmonster]

Could well be memory issues, is the RAM seated correctly and in the proper position (will be colour coded probably). Also try running a memtest

[Badbonji]

Does it blue screen or just restart? Sounds to me like a possible PSU issue, or unstable overclock.

Make sure all components are stock speed and that the memory is running correct timings.
What is your power supply? And what brand?
A few things you could try:
Memtest (tests memory for bad sectors)
Replacing PSU to see if problem dissapears with a spare one to test.
Run Prime95 on various settings for an hour or two, blend /fft options (tests cpu stability, and the memory too)

See how you get on with testing out the problem, and good luck