try to re-register the .dll
Click start in the run box type:
regsvr32 filename of dll
you may need to type the path if you type the name of the dll and right click on it and select properties you can find the location, if still present
MSICUU2.exe is a cleanup utility (was for microsoft office) that can be used to remove any program. this should be a last resort only and has been removed from the microsoft website but can be found other places.