I had him run the memory testing software all night...18 passes and no errors. I had him, just for validation again, run the sfc /scannow again--and again the same result, windows resource protection did not find any integrity violations. I ran the Speccy temp and its ok. He found that the PC had Toshiba diagnostic software...he ran that--and every thing is fine (i.e. PC temperature, hard drive, battery charging, etc.). Ran Chkdsk for the third time too...and again, no problems.
I called Best Buy Geek squad since I purchased the laptop their last August and they need to "see" several BSOD's not just one prior to warranty service. My son cold boots the PC 5-6 times a day (i.e. between classes, lunch, etc.) and averages 2 BSOD's a day. Even if I have it serviced, I would need to buy a new PC as my son needs the laptop every day for college....seems I am really in a tight spot.
I have still not been able to confirm, to my satisfcation, that his special Toshiba, Best Buy only made PC, model # L775-S7114 is the same as the L775_S7111. The latter is listed on Toshiba's website while my son's Toshiba model is not. There is a Bios update for the L775-S7111---I am afraid to let my son try the Bios update as sometimes Bios updates fail, etc--plus I am not absolutely certain that the Bios update will work on his PC.
I guess the only thing I can not check is the motherboard....any other ideas?