Hi, I have the same message, UI Failed to Load, I have sent a ticket as I seem to have 2 valid licences, one for one device, and one for 3 devices. The latest licence email says it will update automatically. I have tried to install again hoping that it would just update, I have downloaded licences and activation codes but still get the same message. I seem to have paid for 2 products, but haven't any protection, as my pc is not protected from viruses. I have not had a reply from the Avast Team, has anyone else had this problem, I'm quite annoyed as I have somehow paid twice for no protection. Unfortunately, I am not 'techy' so am stuck and avoiding doing certain actions on my pc for fear of hacking and viruses.
Carol