I can't see why it would detect it, as I said if the scan for PUPs is off and if Scan All files is also off. I can see no logical reason why it would scan it and even if it did scan it I would think it wouldn't be using the PUP signatures.
I certainly haven't seen and instance of this in the forums, nor have I experienced it.
I've posted my settings for scanning PUPs and Scan All files and we can see they are both UNCHECKED. Which btw, is what we would expect since I've NEVER changed any scanning settings for Avast at ANY TIME and "unchecked" is the DEFAULT setting.
Here is the contents of my Virus Chest and as we can see it contains the PUP application "EndProcess.exe".
So I guess we can now say we HAVE seen an "instance of this" at this time.
And I guess since there is no explanation I'd have to conclude Avast DOES scan for PUPs even with the settings set to NOT scan for PUPs apparently.
Thanks for all the help David, I can deal with the scanning conundrum by "excluding" the program as you had suggested.
That said, it is bewildering however that this is occurring in the first place however. And of course your assumption in the past that people have changed the scanning "default" settings that produced this phenomena is apparently not the answer in at least some and probably most cases.