What I meant is that I already use similar “push” updates: When I get an email announcement that new virus signature files are available from (another) AV company, my Mercury32 email system (fetches emails every 15 minutes from my isp) automatically starts AV-updater.exe /silent /quit ( downloads and installs new signatures).

However this another company sends announcements hours after the update is actually released.
And I have noticed, that Avast sends announcements very soon after the release, so if I could manually start Avast setup with command line options like: /downloadpkgs /noreboot /updatevps /verysilent I would have my own automatic “push” feature working in one minute. Not soon…

I have had two occasions this year, when email viruses (Sobig.F and Swen) started to come in after just an hour or two after the database updates, so
I suppose that timing is critical in real life.