check that hyper threading is not on if it has it in the bios. look for lapic in there too and switch it off, if all else fails give us the details of the board. Power saving must be switched off on everything from the bios and the OPS. You say you have 512 of ram? change the settings so that windows looks after your virtual memory. Put some more ram in as well if you can and update to SP3 if you have not?