I am getting strange charaters on a black screen when I restart my computer. If I hit enter it starts OK. If i do an F9 on the diagnostic screen I get a Boot Test Error BIOHD 3 but I can still start my windows. Also getting a lot of Windows Explorer unexpected fails but it restarts itself. Also getting stange small boxes on my screen, like I'm loosing my Graphics Card. The longer it runs the worse it is, if I reboot it'sgood for a couple of hours.