User-specific keyboard failure

Yes, the keyboard worked has always worked. My daughter was online using my id, when while she was holding down the Right Shift key, a window popped up saying something like " when you hold down the Right Shift button for 8 seconds the numbers lock." The keyboard then locked. She held down the Left Shift button thinking that might unlock the keyboard, which it did. But the next day when I logged on, the keyboard was not functioning.

alright, and have you tried unlocking it again? Pressing Shift 5 times enables Sticky keys, which is used so you don't need to press more than one key to perform commands that want a combination of keys.

What i can suggest is to try the following
If you can access the administrators account, try a system restore. Go to Start > All Programs > Accessories > System Tools > System Restore and select "Choose a restore point manually" or something like that. Then, find a point that has a date of before the problem occured. This method may fail if it has been too long since the problem happened. Try that and les see if it works. This will remove any new software installed after the date, but documents will not be affected. And this can be un-done, so to speak.

Hope i can help. Good luck.