Microsoft PowerPoint 2010

I have a Dell Latitude E4310, Windows 7 and Microsoft Office 2010. PowerPoint is crashing all the time, mostly on exiting, but also on other occasions. I have tried repairing, removing, and uninstalling and reinstalling Office, nothing helps. I have problems, whether I am connected to the company network or not. It does not matter which printer, or whether the wireless is on or not.

I have heard that many others have similar problems with PowerPoint - and that this has been a problem in 2002, 2007, and now also in 2010. I have never had this problem with older laptops and older versions of PP.

Please help, I have a very important business presentation coming up!