Hello Mike,
I apologize for the inconvenience. Please refer this article http://support.avg.com/SupportArticleView?urlname=How-to-resolve-an-issue-when-AVG-shows-the-UI-Failed-to-load-error to fix the issue. If you face any difficulties, please let me know I will help you to get in touch with the remote technicians.
So there's an update on my PC's, on one PC it won't update, on the other PC it updated, told me to reboot, when I did and try to run AVG, said UI error. What gives? So I had to repair.
You know if your going to push an update out, make sure the darn thing works.
It's not right you push updates out and don't test them before final release and brick peoples apps.
I just uninstalled Internet Security, and reinstalled it and it worked. Repair didn't work. Still you need to make sure these updates are avaliable. The one that it was trying to update didn't even exist. When I reinstalled Internet Security, it showed a newer version then the one it was trying to update.