i keep getting bsod whenever playing any games. bf4 in particular. when i use the bluescreenview program it says that the driver at fault is ntoskrnl.exe. ive tried doing a memtest on the ram as well as running it one stick at a time. i've done a test on my hard drive, i also reseated all the cables and updated my videocard drivers as well as many drivers from my motherboard manufacture website but it is still giving bsod. this started when i upgraded from windows 7 to windows 8.1. i have since gone back to windows 7 but the problem persists. help pls 🙁