Disable Prompt? Program?

A while ago, I installed a trial version of an anti-virus program onto my computer. The program was called Radial Point. I got tired of the program, and tried to uninstall it, by going to "Settings," "Control Panel," and then "Add Or Remove Programs," but for some reason, I just could not uninstall the program. I then tried to uninstall it by clicking on the program's uninstall feature, but that didn't work either. SO, out of frustration, I decided to delete the program, by moving the entire program file into my "Recycle Bin." When I tried doing that, one of the files could not be deleted. So, I just manually sent each file that could be deleted into my "Recycle Bin," and then emptied the "Recycle Bin."

But now, for some reason, every time I second-hand click on any files/folders/programs, etc., 2 different windows pop up:

1) Please wait while Windows configures Radial Point.
2) An error occurred while uninstalling the Anti-Virus. Please contact Customer Support to inquire about this problem.

My question is, how do I disable those windows from popping up, whenever I use the second-hand click feature? They're so annoying. Right now, I just close those windows when they pop up, but I just want to destroy them somehow, and prevent them from ever popping up.

Please help!

=(

~A