Come, early february, come faster! ;D
It seems to be chaotic in appearance - one day it’s there and the other it’s not… almoust as though it’s cheating on me visiting those other guys computers)
I have exactly the same problem!
Disappears if you reboot the PC a couple of times.
But this continues throughout January!
…And now February! >:(
As said, you could try the latest beta: https://forum.avast.com/index.php?board=15
OK, so here we are mid February. WHEN WILL IRRITATING PROBLEM BE RESOLVED…Manas?
Update to the latest version (18.1.2326): https://forum.avast.com/index.php?topic=215365.0
Hi!
With new version released an icon left me be by myself… I almost miss it)
Thanks to all ppl, who paid attention to this topic and most of all - to Manas.
Thanks for the feedback.
Hi! Thank you for a great antivirus program.
However, the CAvastTrayIcon window is still causing problems – but in a different way. It’s not visible – but it steals focus on startup! This happens even when “Show Avast Tray Icon” is disabled.
This is highly problematic for an HTPC, for example. I run KODI on startup, in fullscreen, and have been annoyed for a long time that about 30 seconds after the startup, the task bar ends up on top of the fullscreen player window. Finally I decided to do something about it. I changed my startup script to start the MPC-HC media player in full screen mode, playing a file directly.
I did this because it has a useful feature – when it loses focus, it tells you what it lost focus to.
Focus lost to avastui.exe - CAvastTrayIcon
Gotcha! 
Your UI code must be unnecessarily calling SetForegroundWindow or something to that effect.
Would most appreciate if you could stop doing that in the next update!
Thank you in advance.