Ongoing problem

this is whats going on , comp starts up fine , I get on IE no prob ,I look at lets say the weather it well get thire an it starts to freeze and unfreeze and thin I get a bsod and restarts .it seem to only happen within the first 15min of the first start up ,When it restarts all is fine . This is what i have done update marvell sata driver, seem to have helped a lill did a desk check ,memory test in windows , and for some reason it did not make a crash report and did not show up in the action center.
when its up and running I can have it on all day with no broblems
any help would be great thanks