" My Scandisc always says that a disc ulitity is blocking the Scandisc."
That error message leads me to believe he has another utility on there.

You can run scandisk in safe mode. Some of these utilities will continue to run even in safe mode. You can also run it in Normal mode if you turn off all running programs and disable the screen saver. To shut down the running processes press Ctrl+Alt+Delete and highlight a process and click end task. Repeat this until all you have left is Explorer and Systray. That will likely disable the utility.