Autodesk Revit 2010: Startup Error: Revit Could Not Load RevitMFC.dll

Good morning friends,
I am an electromechanical engineer, working here in Dubai for a big project. We are using all sorts of Autodesk products but have a problem with the my Autodesk Revit 2010 drawing software. When I install Revit it says "Startup error: Revit could not load RevitMFC.dll". I have a pretty good desktop computer with nice specifications an I'm using Windows Vista Ultimate. I have no idea whatsoever why it won't install. Can someone help me with my problem? Thank you for reading,
Hoping for a quick response from the great Techyv guys out there.
