AVG FREE is a virus itself. Do NOT install it! It will open up a big pop-up, mid-screen so it blocks what you are doing on your computer. It makes a popup like this at least once a minute. It does NOT let you uninstall AVG FREE unless you have access to administrator. (hopefuly you know you administrator password, or it won't let you uninstall).
I got rid of it by doing a SYSTEM RESTORE.
DO NOT INSTALL AVG FREE - IT IS A VIRUS ITSELF, and VERY ANNOYING