AS Anti Hacker Removal

Apologies if this isn't the right forum for this but I got a free download of this product in February and I'm getting pop up messages now every 5/10 minutes telling me my subscription has expired. The problem I'm having is that I've decided I don't want to renew my subscription yet I can't uninstall the program. It isn't showing up in "Control Panel" "Programs and Features" where I expected it to be so can't delete it from there and when I try and delete the Program through "C/Program Files" I get the message "You need permission to perform this action". Has anyone else come up with this problem or can somebody give me another way of deleting the program?? Thanks!!