I got a gpu from a friend, uninstalled the previous integrated graphics card's drivers, and then shut off, installed the gpu, an ati radeon 3450. started up and got bsod. after a few trial and errors I got it running, and it auto installs the driver, and then I get vertical lines on screen, no image, just solid color with lines. system restored, which most likely reinstalled the nvidia drivers, and still had the new card in, it still started up and will run for a few seconds, but then i get vertical lines again. I thought that it might be over heating, so I opened the case up and turned my fan to it. which didnt help. now I stupidly tried to do a factory restore on the computer, so that none of the drivers would be installed, but now the screen is back to vertical lines, so im waiting for the process to finish and hope for the best. need help please or have I just royally screwed myself.