I need help BADLY! (Pest Patrol)

I was just wondering if anyone here knows how to fix a problem im having. I had this program named Pest Patrol and my friend tried to uninstall it and it wouldnt work. Every time the computer boots up, the first thing I see is a popup message that says “warning, the file ppfile.dat cannot be found”.
The problem is that the Pest Patrol program uninstall file is know missing. What should I do?!?

Thanks in advance=)