A Windows PC software is pushing its app onto my android devices. How can I avoid it? This weekend I installed a popular Windows antivirus in my PC laptop. The installer offered the android app, and I denied it.

Nonetheless, a couple hours later all my android devices had the antivirus' app pushed onto them, even the ones that were lying around unused for a week.

It means that none of the devices (three tablets and three phones) were ever connected to the PC in the previous or following days. And the installation notification for the antivirus app had Google play's icon. 

I haven't order the download of the antivirus from the play store to the devices.

It seems the antivirus software or its installer did it from the PC. I have several google programs (drive, chrome, etc) installed on the notebook.

Due to Moderator request, the name of the antivirus is Avast free.
You (or someone else) probably accidentally click this banner on the main screen.

And &quot;Accept&quot; the offer.

(Note: this dialog may also pop-up on reboot)
- OR -
Avast pushed the installation silently (which I still doubt since it didn't happen on my case).

Avast gets the Google accounts saved on the Chrome, and it's possible for them to offer their products on connected devices.

Hello,
Thank you for contacting our support center with your concerns.
We have got it from your Chrome account. If you are signed (permanently) to your Google account in some web browser, Avast can read your devices added to this account and offer our products. This situation can't be blocked.

(Source: Google Forum)
Additional reading: &quot;How did Avast get my Google account info and install itself automatically onto my phone when I hit 'accept' on the desktop app?&quot; on Reddit.