If you're going to pop up warnings that say "Windows Security 2011 has found critical process activity on your PC and will perform a fast scan of system files!!"

and then popup a Javascripted "scan" of my PC

and finally ask me if I'm sure I want to leave because my PC is at risk of infection, saying, "Your system is at risk of crash. Press CANCEL to prevent it,"

here's a suggested addition to your script: check the computer's operating system. If it's running Linux, why are you even bothering?

Additionally, check your grammar.