|Are you using a logitech mouse?|
Start >> Control Panel >> Mouse or launch the "Logitech Mouseware Mouse Properties" software from all programs, click on the Buttons tab & For "Scroller", set to the following: Check the box labeled "Use MS Office compatible scroll only." Also, check the box labeled "Scroll in active window only". Goodluck!.
And don't double post in the future - even if you feel the urge to do that out of desperation.