atikmdag.sys, I think, is the control center. With it running, the windows controls are available. If it is not running they are grayed out. But running it is not an option. It is actually not my computer. It is a senior friend and I think she may be happy enough with it the way it is. Unless I can get a version of the sys file that does not make the computer start/stop, that is the way it is going to be. It would never have been mine, but she didn't ask me.