Can't update avast program nor virus definition : unknown error

Viruses and worms
1

SOS!

I’ve just done a fresh clean windows10 install on a formatted SSD but problems remains with Avast! :cry:

The avast antivirus program or the virus definition file can’t be updated anymore on both computers running Windows 10 64bits.
It always fails returning an “unknown error” while downloading files :“servers.def.vpx”, “prod-pgm.vpx” or virus def files.

Also sign in to my account (Google+) from Avast free Antivirus seems to be broken…

On PC 1 : Avast Free Antivirus 12.3.2280 (build 12.3.3154.23), virus def 17406.2
On PC 2 : Avast Free Antivirus 17.3.2291 (build 17.3.3443.0), virus def 170329.2 (Fresh Windows10 install)

My internet connexion is OK but Avast is seriously obstructed on both computers. I need your HELP!

Thank you.

2

Perform a repair of avast and see if that solves the problem.
If not, perform a clean installation of the latest avast version with the off-line installer and check if that solves it.

3

Hello Eddy. Thanks for your reply. I’ve done both of your suggestions prior to post here and problem remains.
I’ve done some logs also… hope this can help somehow

4

Am i the only one facing this situation ? :o

5

No, I am having the same issue. I have completely uninstalled and reinstalled fresh, also tried a repair of the new install and still get unknown error when trying to update virus definitions.

6

Did you use avastclear ?

7

Came in to see if there was an answer to this as have had this problem for around a week or so same as above will look for the avast clear see what that does…

8

I’ve seen a report from someone where his ISP was the problem.
Changing DNS settings to use Google DNS solved it for that person.

9

Issue also reported that setting changed to use proxy; default setting is to use a direct connection:

10

Please try resetting Internet Options > Advanced > Reset Internet Explorer settings to defaults. This will reset all Internet related settings (proxies, connections, etc.) to default settings. You can find the dialog window by clicking Start > typing Internet Options in the search text box.

11

My problem came from a 3rd party firewall, I only use System and Web Shield, all other stuff unchecked on install.

I was getting the “Download failed with error 0x00002bdc!”.

I added a rule for C:\Programs\AVAST\setup\instup.exe through my firewall and the updates now work.

Oh it help a few of you as I did not find a specific topic on external firewalls… one from 2005 and 2009 but nothing pertaining to a more recent version.

Present version: 17.5.2303