I own a Compaq Presario SR513WM desktop computer with Vista & 2GB RAM. It had been freezing up and recently caught a virus, so I decided to use the System Recovery disks I'd purchased from Compaq. The recovery process works just fine, and at the end of the process the computer reboots. That's where the problem shows up. The computer displays the Compaq splash screen and then just goes to a black screen with a flashing cursor in the top left corner. I can go into Setup and the Boot menu, but no changes I make there seem to have any effect. Hitting the F8 key during startup has no effect either. Any ideas?