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Consumer Products => Avast Free Antivirus / Premium Security (legacy Pro Antivirus, Internet Security, Premier) => Topic started by: noz on June 15, 2006, 03:56:12 PM

Title: Avast and firewall issue
Post by: noz on June 15, 2006, 03:56:12 PM

Hi all,

I'm working on a security support and since a few days, many users reports us this issue on windows XP:

since avast deleted some trojans, they can't connect to web, firewall can't be activated.
an error about "newdot.dll" which doesn"t exist or an error "no tcp compatible protocol found"
If we try to activate the firewall service, an error 10047 appears.

This issue is resolved by simply doing a "netsh winsock reset", but is it a known bug?

Thank you.

Title: Re: Avast kills web connection and windows firewall
Post by: XMAS on June 15, 2006, 04:04:15 PM

Hello and Welcome to the forums :)

I think that this could help you:
http://forum.avast.com/index.php?topic=21608.0 ;)

Title: Re: Avast and firewall issue
Post by: noz on June 15, 2006, 04:08:13 PM

Thx for the quick answer

I found this topic after posting mine, and you didn't let me enough time to edit my post :D

I'll post questions in the other topic....

Title: Re: Avast and firewall issue
Post by: igor on June 15, 2006, 04:10:45 PM

Well, actually it is a bug.  >:(
When avast! removes an infected file, it also removes the corresponding registry references (at least the main ones) - similarly to what HijackThis does, for example. In this case, however, the removal of the LSP records failed (or rather, only 2 of them were removed, and 2 more were incorrectly left in registry). This causes any subsequent WinSock initialization to fail - thus blocking the network access.

The problem will be fixed in the next program update, of course.

Title: Re: Avast and firewall issue
Post by: noz on June 15, 2006, 04:36:14 PM

Thanks you for the infos

Hopefully it is easy to fix!!