Since I bought and installed LR and GRA through Steam, NV crashes constantly every 1-2 hours of gameplay. I try verifying the game cache every time, and every time it downloads a file. Then the game works fine for 1-2 more hours then crashes again.

It's like the file it downloaded disappears every time.

I don't have any mods, my hardware is way fine (NV never had any problems up until now and I can run any game perfectly). I don't want to verify the game cache every time the game crashes, I want a permanent solution.

Oh, and my graphics card drivers are up to date. So it can't be that.

What should I do now?