Can anyone know but you? Have you tried to access Adobe, a known trustworthy site, with Avast temporarily disabled? Would this not be a viable test, with some amount of safety?
I don’t understand you.I am trying to help OP.Someone had the same problem a few days ago and disabling AOS add-on was solution.
It is not a problem to enable it again after installer is downloaded.
If you are using Chrome, you don’t need it. It’s included with Chrome.
If you use Firefox or IE you will need it. The best way I found to download
Flash Player is via IE.
edit: Chrome won’t even allow you to download Flash.
You must use either FF or IE.
As a web developer, I personally disapprove of websites that still use flash. I have long since uninstalled flash in favor of HTML5. Flash is also now disabled by default on many mobile devices.