When I go to the Avast page, the following error is displayed:
We support browsers, not dinosaurs. Please update your browser if you want to see the content of this webpage correctly.
The browser is the latest version, there are no updates on Windows OS.
What to do?
What browser/version?
Also where are you trying to download it from because I’ve just gone to the official AVAST download pages deliberately using a very old browser and have had no similar problem.
Also what Windows OS version ?
XP and Vista are no longer supported, the last Avast version that supported XP was 18.8.
See https://forum.avast.com/index.php?topic=220639.0 and see https://forum.avast.com/index.php?topic=220639.msg1490445#msg1490445 for links if you are still using XP.
i have a Windows 10 with latest update and Edge browser. All other browsers on this PC have this problem with your site
Is there a specific (or any) link you are having this problem with, then it might be possible to investigate ?
I regularly connect to the mail avast.com site whilst investigating topics in this forum and I don’t have any issue with my default browser Firefox and win10.
Can you post a screenshot of this error
Resolved
1 button “Reset network” (“Сброс сети” по-русски) 
Thx for All
You’re welcome.
Thanks for taking the time to give your resolution.