Its been a long time since i last used my pc and i had to replace both my screen and keyboard, i also vacuum cleaned my graphics card and the cooler fans because they were packed with dirt. Now i have updated everything on my pc and still, everytime i launch a game it has incredibly low perforcmance and about 3fps for about 10 secs before my entire pc just crashes and i get a black screen. Then it restarts and everything is as usual...why? Help pls