You can always try disabling your AV suite then try the upgrade. if not, I would uninstall the AV suite reboot then install the upgrade. There are several free AV applications you can use till you get back to your applications, Good Luck!I would rather not do a full version of Windows as opposed to upgrade as I don't have any of my programs with me. We are on vacation of another month, and all my original programs are at home. I do have a security program - Telus. Any other suggestions?