What if WSC falsely thinks another av is installed ?
If any othey AV is registere in wsc, reporting ON status and doesn't scan, it is a bug in other AV and we can do nothig about it.
Does this mean that Avast is content in being installed as a second fiddle AV 
It would have been much nicer to remove or incapacitate the other AV and make Avast primary.
An interesting point, but think of it the other way round. If you are running Avast and you try to install another AV on top of it, would you want that other AV to have the power to disable Avast and replace it? If a program can have that power, so can a malware. Seems a lot better for Avast to be able to co-exist and do a scan that may show problems that were missed by the other AV. The user can then decide which AV is worth keeping.
Plus, you know how many threads over the years where users O/S are bricked because of conflicting A/Vs ?
This change will make sure Avast doesn't cause a problem with an install.
However, I think DURING install Avast should pop-up a warning that it sees another A/V....a lot of times users don't know (eg. A/V expired) or an uninstall of other A/V is not clean.
Avast should state during that pop-up the limitation Avast will be installed under if they proceed and suggestion to exit install to go clean (fully remove) other A/V.
Since Avast is doing check...this should be done first in the process.......and also give user which other A/V it sees.
This may help:
https://www.youtube.com/watch?v=QtkxeASxYVU
As always, great videos.
My point of my comment is that this is I think this would be more effective to be communicated
during install.....almost first step.
My thought is many times users don't realize a other A/V can have conflict, or even that they have it installed.....example, their A/V trial has expired, etc.
Meaning........Avast tells you during install there is a conflict and will be installed in "passive" mode.
This would allow an exit of the installer and user goes and do a full clean uninstall....then comes back.....or if they choose to proceed they are aware they have selected "passive".
I REALLY like that Avast has put in this feature.......shows they are concerned about users trying to use their product and detramental effects on their PC...kudos Avast !!!!
