Set everything to default as the other people said and then:
Run memtest86+, usually the random bsod are caused by faulty ram or mobo, but to know if the mobo is faulty you have to check everything before because there is no bench or test for the mobo.
Also, check the temperatures and the graphic card stability with crysis benchmark for example. If the gfx card can run like 15 loops of the crysis bench, its rock solid almost 99%.
Keyboards, keyboards everywhere.