My old computer began having problems when I was running games on its onboard graphics. It was fine for 2 years, then one day I got a purple screen with vertical white lines accompanied by a loud buzzing from my speakers. It began happening with every game I played; I would get to the main menu, click start and get the same screen. I gave it to a friend who is more tech savvy than I and he replaced everything in it except the hard drive, including installing an old graphics card. After doing a clean install of windows and redownloading the graphics drivers twice, I have the exact same problem as before. What should I do?