Tech Support Alert Web Pages like these that "pop-up" on your PC's desktop are nothing more than an invitation to get yourself scammed out of your identity. If you call this "Toll Free" number you're going to get a guy speaking in heavily accented English who will ask you a bunch of standard IT Support questions: what operating system, how old is your computer, any new software installed, etc. Eventually he will explain that he will need to remote into your computer to see