0x0000007F BSOD When i play games on my PC

At first i figured i needed an up to date driver for my graphics card, this didn’t work, so i sent my PC to get fixed and recieved a new graphics card from my dealer and still i get the message.. i have viewed the microsoft page on this error and i am still none the wiser (don’t really understand most of what is said) any dummified answer would be appreciated, thx