I would try uninstalling AC, rebooting and trying once more installing as an administrator. I do think there is something on the website that you will have to do one extra tuner if installing from a version that old....you will have to look. If all else fails talk with someone like Bert who I think has archive of many versions and try upgrading to an interim version first. If this is your active machine and it will prevent you from using it Monday - call Guardian support and leave emergency message they will get in touch with you and help you.
