I have uninstalled and reinstalled Microsoft office 2010 3 times now to make sure that this is not an installation issue. The same problem still occur where every time I'm in Exel and format a page, when scrolling I get a very annoying delayed and overlapping effect. the problem is not my video card. and I called Microsoft and they said I might have corrupted filed in my registry. So, How DO I perform a Registry cleaning please? they were trying to charge 100 dollars to do it.. not cool