I purchased AVG this week and installed/activated it. The problem occured when I used system restore to fix a problem with itunes. It appears since I've restored my computer to the day before AVG was installed that I no longer have it protecting my computer. I've tried running the AVG disc but it leads me to their site and when I enter my license key the site says it has already been activated. How do I reinstall it? Is there a phone number I can call for support? Thank you.