http://screencast-o-matic.com/screenshots/u/Lh/1464980138130-88905.png
Why is this popping up when I start the system ???
You should post that in the beta forum, not here 
Hi Bob, did you try a repair yet…?
No but this morning it didn’t open ??? ??? ???
When I get the time, I’ll be looking for the gremlin. 
Sometimes a simple reboot fixes such issues/glitches. 
This happened on 2 different systems. 64 bit and 32 bit. Both had been restarted
numerous times with the UI opening each time at boot.
This morning, on the 64 bit system, the Avast UI didn’t open. I haven’t access the other system today.
No such problems here…
But as Eddy suggested, it probably fits better in the Beta section.