I have the almost the same model. Your graphics card keep crashing and usually recovers? Nvidia drivers are gonna screw you every time. But, to answer, step 1 is make sure there's nothing left over from previous drivers. Then work up from critical metal. Mobo and chipset drivers, then ports and slots, then the things that go in the slots, gpu last.
Good luck. If I was you, I'd start with Linux, dell is gonna give you contradicting info and windows elite don't mess with 10 year old hardware.