How thoroughly has this been tested on Windows 7 Pro, 64 bit, with a year 3 ESU, and the latest (February 2022) patches? With 22.1 and now 22.2 BETA I'm seeing problems with AvastUI startup. It and AvastSvc consume lots of CPU and system commit memory starts climbing. The UI comes up as simply a white window, although sometimes it pops up with a message that it's crashed. Usually, but not always, after killing AvastUI.exe I can click on the Avast Premium Security icon and all starts to run correctly. It's the same behavior for administrative and non-administrative users.
After the first reboot following an install (clean or update) everything works fine. Reboot again, and the UI is usually broken.
Given that I see AvBugReport briefly running after a while, I suspect this should be already reported.
Another W7 system without any any ESU patches doesn't exhibit any issues.
Either something is broken in 22.x or Microsoft has made a change in how IPC works with their recent "fix".
On a positive note... 22.2 Beta seems to have fixed boot time USB device scanning (COM port is still broken).
Cheers, -tk@ieee.org