As a result of the new software update, loaded today, I am unable to launch the UI of Avast. When I click on Restart Service, a new screen pops up and is immediately replaced by the Restart Service screen. I have rebooted 5 times with the same result.
Using a Surface Book with Windows 10 Pro, version 1803., 64-bit.
Have another Win 10 desktop computer 64-bit which was able to successfully run Avast after install. Received the same error as above, but after rebooting 3 times it started correctly.