I allowed Avast to download and install this update, but have not restarted PC yet. Is there any way of avoiding the update from taking effect until a solution is found?
how about you download and install last months stable releaase thn you install it manually ..?? That can work
How can one download and install last month's stable release and install it manually?
And then also disable app updates, only use virus updates?
Unfortunately the short answer is that you can't unless you actually saved the installation file from that version.
Most of the software updates, might well say that they have older versions, in most cases they use the on-line installer and that would install the latest version.
You can set Program updates to Manual or Notify from the Avast UI > Menu > Settings > Update - More options area.
Fortunately I found
GOOD avast_free_antivirus_setup_offline_20190814_v19.7.4674.0.exe
and
removed the latest
CRAP avast_free_antivirus_setup_offline_20190918_v19.8.4793.0.exe
(because it creates High CPU usage and Blocks FFdev32 and other apps, what a joke, what untested RISK!!!)
You SHOULD DEFINITELY have a roll-back feature.
Also, have the old versions in an archive so people can choose, e.g. b/c of their older OS or for whatever reason. Trust me, they will like you more!
In any case, thorough answers are key to build trust.
What are the command line switches to install so that updates are forced "manual" from the outset, and each option from individual install can be controlled (file shield, web shield, mail shield, behavior shield, cleaner, network inspector, silent mode, etc)?
Had meanwhile antvr and kasprsk and bitdfnr, but their interface and options are a joke! Avast rules, but don't get cocky (like FF did), keep the nose on the grindstone, the ear on the track, and the goal in sight