I receive an error message that says "An unbundled exception has occurred in
a component in your application. Click continue and application will ignore
this error and attempt to continue. Object reference no set to an instance
of an object."
The windows installer box then appears and nothing I do can remove either.

The initial error message appears in a Microsoft. Net Framework box.

I'm running XP and have recently downloaded SP3.

Any suggestions as to how I can correct this problem?