1. Reinstall that program (fully).
2. Download WINDOWS INSTALLER CLEANUP from Microsoft and give it a chance.
I'm currently trying to resolve an issue with a friend's laptop.
Everytime I login I am greeted with a installation request from setup.msi in a virtual folder.
I have no idea where this is being generated from or in fact why it is being generated but I want to get rid of it.
A screenshot of what I get, along with the file url pasted in notepad, can be seen here: http://yfrog.com/5hdumpqj
Any help would be much appreciated.