I have three hard drives that can boot up and it acts the same on all three, Two Windows 7 Pro and one XPPro. It will boot fine into safe mode and seems to run OK with no crashes or shut downs. Memory diagnostic test and Norton virus and spy ware scan done in safe mode revealed nothing. It does same thing whether using onboard video or Radeon 4670 video card.
The motherboard is MSI DKA 790 GX, CPU IS AMD 64 X2 Brisbane 2600 65 watt, PSU is PC power and Cooling 759 watt ATX12V/EPS SLI Certified. RAM is 4 GB G.Skill DDR2 800.
Voltage readings are 3.3+ 3.408, 5v = 4.666, 12v = 12.144 in bios readout.
Is there anything I can do to try clarify problem more beside taking it to repair shop.