I tried to install the new Avast version via the previous version GUI and a clean install of the new version, but both failed. I followed the usual suggestions such as uninstalling, reinstalling, running avastclean.exe, and rebooting between attempts, but all I get for a GUI with the new version is a big white box. Fortunately, I have an image backup from a few days ago, so I was able to restore the previous version of Avast. Also, the lack of an indicator showing the installation progress, or even whether or not the software installation is completed, was frustrating. Is it installed, or not? No way of really knowing for sure. A very disappointing experience. I was going to recommend this software to my clients, but thank goodness I did not. What a fiasco that would have been.