Avast 7 stops Internet!

Avast Free Antivirus / Premium Security
1

Hi!
I’m from Bulgaria.
If anybody can help me, please?

So the case is this:

1.DELL Optiplex 755 with all original parts
2.Clean Windows XP SP3 Install Activated
3.Installed original drivers
4.Nothing else installed!!!

-Before installation of Avast Home - internet was working.
-After installation of Avast - I have no any internet - even Windows update.
-Internet connections are working.
-I have ping to all over the world.
-Avast can make definitions and program updates.
-When I stop Avast’s Internet Shield - Internet Programs are working again.

After uninstallation of Avast Internet is working again.

Am I doing something wrong?

Thank’s in forward for youre spended time.
Have a good day!

2
  • Which avast!..?? (Free/Pro/IS)
  • Which version…??
  • Other security related software installed…??
  • Which AV did you use before avast!..??
3

What is your firewall ?
Does it allow avastSvc.exe internet access ?

  • If it does delete the entry for it and reconnect to the internet, this should force the firewall to ask permission again.
4

Asyn, DavidR
Thank you for youre kindness
I’ve wrote in the first post, but:
Nothing else installed!!!
Avast Home - the last possible to download
Windows Firewall.
Thank’s!

5

Unfortunately the windows XP firewall has zero outbound protection, so that shouldn’t be the problem.

Also see Cause for apparent Web Shield blocking internet connection, http://forum.avast.com/index.php?topic=57443.0.

Asyn’s comment on other security related software, can also relate to previously installed. So if you had an anti-virus installed before avast then that may be an issue, remnants can interfere with the newly installed AV.

Have (or did) you another Anti-Virus installed in this system, if so what was it and how did you get rid of it ?

6

Hi!
No - I’m working with PC’s around 10 years(exactly from Win 95)
And I’ve wrote - Clean Win XP installation with PC’s drivers and Noting else but Avast Home.
It is strange!
Because I’ve made many friends PC’s installations, and now for my work PC - that strange issue.
I’ll read that post you gave me.
And will try to fix the issue.
Thank’s for now!

P.S The Post explaining issue with %SystemRoot%\Temp doesn’t help
Same situation - No Internet.
If I disable WebShield - Internet has comming back.
If Enable Webshield - No Internet.

7

You’re welcome, hopefully it is an issue with system Temp variable.

8

But it doesn’t help!

9

Yes, didn’t see your Edit/P.S. occurred whilst I was posing my reply (30 seconds before).

How do you connect to the internet dial-up/broadband ?
Do you connect to the internet via a proxy ?

10

Connecting to internet with LAN network from ISP Trakia Cable - ~30Mbps
No proxy
When I uninstall Avast it automaticaly opens Internet Explorer for Avast’s survey: Why uninstalling Avast?..and Internet has comeback.
Tryed uninstalling throu Control Panel and with Avast’s aswclear.exe
Doesn’t help!
Installed Microsoft Security Essentials - No problem with internet.
The only thing that bothers me is that I like very much Avast.
I’m using this antivirus program as early as version 5.
And never had any problem with it.
And now…

11

I hate mysteries too, I can’t see a reason for this as the XP firewall shouldn’t be an issue and if your system variable for TEMP point to the correct location %SystemRoot%\Temp.

The only thing that wasn’t tried (unless you didn’t say) is an avast repair, but having uninstalled you can’t try that.

12

Tryed that.
It was the first thing going throu my mind.

One thing else - I have one old installation file of Avast: “setup_av_free v6.0.1000.exe”
I think to install that version after Acronis restoration before Avast v7 install and see if the problem has gone.
But if the problem is the same - I assume the version of Windows XP SP3 on CD is causing that problem(that was the second thing I’ve consider).
I’ll give a try tommorow.
Thank you again for youre time.

13

You’re welcome.

As you can see from my signature I’m using XP Pro SP3 so your copy shouldn’t be an issue (I think).