If its bad drivers, start the comp in safe mode, review the drivers installed for any red x’s or yellow marks that tell you driver issue. Either delete those or update the bad drivers. If this does not resolve it, download your video drivers to a place you can find them in safe mode. Remove old drivers in safe mode(may need to restart into safe mode again after removal) and install new drivers.
If this is a ram issue, you can dl memtest or something to run a test on the ram. Otherwise, you can remove 1 of the ram sticks, see if the issue goes away, if it does not, put the stick back in and pull the other(shouldnt usually be more than 2 in a laptop). If that fixes it, replace the bad ram stick(or both if you want matching ram)
You may want to try to restore windows to a known good version before this started.
Also, the Blue screen of death should have a stop code. That stop code gives specific info on the issue, more than VIDEO_SCHEDULER_INTERNAL_ERROR usually.
Once again, I would run eventvwr in windows to see what the system is reporting when the crashes happen. This can help us determine a solid resolution for you.
Also, you did not by chance sign up for the free upgrade to windows 10 from 8.1 did you? My friend had a similar driver issue on 8.1 and the upgrade to 10 fixed it. This also may be reason to setup the PC on win 7 if possible as 8.1 has been known to have some real driver issues with laptops specifically.