I would do THIS before anything:
1) Update your BIOS if it's not the newest.
2) CPU and Memory to DEFAULT settings (on Intel boards you click "XMP"; I think it's "AMP" for AMD boards) then SAVE
3) run MEMTEST for at least one full pass www.memtest.org
*Burn DVD with imgburn (or use the USB method). May need to change BOOT ORDER in the BIOS so DVD/USB comes before the Windows drive.