A clue would be that if you found it in there, it probably wouldn't work. 😀 You might, however, find that the scroll bar is turned off - look for a little bar at teh far end of the touchpad, acting as a toggle switch - press that and it should return to normal; behaviour.
I assume you're running Vista - I have experience of working on one of these which had been upgraded to Windows 7 in which case the touchpad behaved badly and the webcam cannot be made to work at all.
By the way, mimi7's Youngster tag is a Tom's Hardware description based on her post count and doesn't reflect a lack of knowledge. They describe me as an Addict for reasons I don't understand.