With Vista (don't know the version but it old) running and while trying to connect a monitor to my lap top serial port, I got a blue screen error message that some file (don't know which) was corrupted. Computer would not respond so I eventually did a cold shutdown. Now when I start the computer I get a screen saying Windows didn't shutdown properly and gives me the option to start in repair mode (recommended) or start normally. No matter which option I choose, even with the system recovery disk in the DVD drive, I get a black screen and at the bottom of the screen a moving bar and Microsoft Corporation. Depending on which option I choose the DVD spins up and stops, the hard drive will run for a while, turn off and the screen will go blank (in repair option) or the black screen with the moving bar stay up until a cold shutdown.