Check:
>Check your PSU model through google to see if anyone has posted anything on your particular model.
>CPU clocks and core voltage.
>RAM/DDR timings, if possible set to 'auto' or 'By SPD'.
>AGP Transfer Rate is 'Auto' or as required by your adapter.
>Disable 'Fast Writes'.
>Enable 'Pnp' plug and play settings.
>Set your IRQ Assignment to 'auto'.
>Disable all overclocking settings and utilities.
>Check your RAM modules for consistency (This was the cause of my resetting woes!). Download this ISO and burn to CD-ROM.
Code:
http://www.memtest86.com/#download1
>Update your mainboard drivers, i.e. VIA Hyperion 4 in 1.
Code:
http://www.viaarena.com/?PageID=300
>Update your graphics driver:
Code:
http://www.nvidia.com/content/drivers/drivers.asp
Code:
http://www.ati.com/support/driver.html
>Disable your anti-virus real-time checker.
Hope it helps...