Crazy Lines On Screen Leads To BSOD.

As said above in the title my computer has recently started to fail on me. Its about 3 years old and recently its been BSODing almost every 10 minutes. Games, browsers, anything you can name will cause the BSOD. It starts with a few lines on the screen, the screen were start to stutter and will eventually lead to a BSOD. I'm quite new at the whole tech kinda thing so forgive me if I can't...