Dell Inspiron 2200 laptop with Windows XT.
I was attempting to bring up Task Manager to show my wife how to deal with non-responding programs; my finger slipped off one of the keys (control, alternate or delete) and hit some other key or combination of keys on the bottom row. Suddenly, the screeen rotated 90 degrees right. Shutting the computer down doesn't help; neither does randomly striking keys.
What do I do?
Thank you very much.