Okay so to make a long story short, I built a basic PC for my sister last year with an AMD A8-3850 because she didn't want to spend the money on a graphics card (she doesn't play games or anything, it's just for work/homework stuff and browsing the web). In December the GPU in the A8 failed so for Christmas I bought her a Radeon HD6450. Just got around to installing it about a week ago and since then the display driver fails every few minutes, sometimes there will be some artifacts on the screen and then the monitor flashes back and it comes back to life with the error message (display driver failed then recovered). I've tried uninstalling the drivers and updating to the latest to no avail. I've tried going into the BIOS to see if I can disable the integrated GPU, as that's what I thought was causing the issues, and can't. Aside from formatting completely and starting over, does anyone have any suggestions on how to fix this?