No more internet after install AVAST 5.0.677

Avast Free Antivirus / Premium Security
1

Hello,
I’ve just bought a PC ACER Aspire AMD Athlon 64x2, and reformated the hard disk, and installed a new XP SP3. Everything works fine.
After installation of AVAST, the web access through Mozilla Firefox or IE is impossible, although the internet connection is there (good update of Avast files or windows)
Do you have some possible explanations ?
Thanks in advance
Chichiviriche

2

What Avast! you have would help troubleshoot.

Free, Pro, or Suite?

3

Any firewall installed?

4

Had the same issue with the latest update. I’ve been using the Free version for months but every since the very latest update (I have it set to download and install updates automatic) the Internet connectivity was intermittent. Completely uninstalled Avast and the problem hasn’t come back. I run Windows 7 64 bit, firewall is off. Also, when I would try to go into Avast control panel the program wouldn’t respond.

If there’s a log file or anything a tech wants to look at let me know.

5

I had the same problem on all 3 of my pc’s had to uninstall and re install.Firewall had nothing to do with it as I tried it with the firewall shut off.Working fine now.

6

I’m using Avast 5 Free.
I’ve the standard firewall of Windows XP, I touched nothing from the standard XP installation
If I desactivate AVAST, the WEB access is Ok. When I reactivate, the WEB access is gone.
What can be the cause ?

By the way i just read above that marc-d-l had the same problem, and solved it by uninstall and reinstall ?

7

Hello,
can you please continue to help !
With my new XP SP3 installation, the first program i installed was Avast5 free.
After installation of AVAST, the web access through Mozilla Firefox or IE is impossible, although the internet connection is there (good update of Avast files or windows).
If I desactivate AVAST, the WEB access is Ok. When I reactivate, the WEB access is gone.
I’ve done a proper uninstall and reinstall, but the result is the same.
What do you suggest ?
Chichiviriche

8

@ Chichiviriche,

User OS: XP SP3
Avast Free
XP FW

***What other security software do you currently have or did you have in the past on this machine including antivirus (AV), firewall (FW), and other security programs? If they were in the past, how did you remove them (the vendor’s uninstaller’s tool or another way)?

Have you tried a Repair of Avast:

  • Go to Control Panel > Add/Remove programs > Avast Antivirus > Remove.
  • Then choose Repair function in the pop-up window (Repair). Reboot.

If the repair fails, follow these exact instructions for an uninstall and CLEAN install of Avast:

  1. Save a copy of newest version of Avast (5.0.677) for the version you need and save it to your HDD:
    Free – http://files.avast.com/iavs5x/setup_av_free_eng.exe - (English only)
    Free – http://files.avast.com/iavs5x/setup_av_free.exe - (Multi-language version)
  2. Download the Avast Uninstall Utility, aswClear5.exe http://www.avast.com/uninstall-utility and save it to your HDD (it has uninstall tools for both 4.0 and 5.0).
  3. Disconnect from the Internet at this time.
  4. Boot into Safe Mode (hit F8 repeatedly) and run the Avast Uninstall Tool.
  5. Reboot twice.
  6. Install the newest version of Avast and reboot.
  7. Get Internet access and update Avast definitions.
  8. Register your copy or add the license key for Free
    Free – http://www.avast.com/registration-free-antivirus.php

Let us know how this works out for you.

9

Hello,
as, I said, my ACER M3100 PC has just been reformatted, with a new XP/SP3 installation : so no programm, no other other antivirus.
I’ve tried already a proper clean uninstall and reinstall, as you explain, but the result is the same.
If I desactivate AVAST, the WEB access is Ok. When I reactivate, the WEB access is gone
What shall I do ?
Thanks
Chichiviriche

10

Check your computer for malware with Malwarebytes’ Anti-Malware (MBAM).
· Download free http://www.malwarebytes.org/ for an on-demand scanner.
· Double Click mbam-setup.exe to install the application.
· After install, click update so you have latest database before scanning.
· Under Settings:
o General: Automatically Save File After Scan Completes is checked off
o Scanner Settings: Check all boxes
o Updater: Download and install update if available is checked off
· Once the program has loaded, select “Perform FULL Scan”, then click Scan.
· The scan may take some time to finish, so please be patient.
· When the disinfection scan is complete, a log will appear in Notepad and you may be prompted to Restart. (See Extra Note).
· Click the “remove selected” button to quarantine anything found. You will find the infection details under the Quarantine tab.
· The log is automatically saved by MBAM and can be viewed by clicking the Logs tab in MBAM.
· Copy & Paste the entire report in your next reply.

11

@ Topic Starter,

I think a conflict of windows update.

Is you OS Legit?

Did you try uninstalling Firefox? and see if IE has a web access?

12

I also encounter this issue. After updating to 5.0.677 (aIS, and it’s the only security-related software on my pc, with Windows firewall and UAC off), I have to disable Webshield after booting before I can get access to Internet. Though I doubt why Webshield would suddenly work fine and doesn’t block my connection if I restart it some time later(15 minutes at least or so, I think).
Anyone got an idea on what’s wrong???

PS: I’ve tried a clean re-installing of it, but of no effect.

13

It seems that we are many to have exactly the same problem, in the same conditions !
On my side, I’ve a legit XP, and no other program installed, except Avast 5 free and Firefox. I don’t know if windows updates can make a conflict.
Avast, help please !

14

@ Chichiviriche,

I am still waiting for your Full MBAM scan. Please see my post on how to download it, then cut and paste your log. This will give me information so that I can help you. Thank you.

15

Hello SafeSurf,
here is the full MBAM scan, as you asked. Thanks
Chichiviriche

Malwarebytes’ Anti-Malware 1.46
www.malwarebytes.org
Version de la base de données: 4672
Windows 5.1.2600 Service Pack 3
Internet Explorer 6.0.2900.5512

22/09/2010 19:58:16
mbam-log-2010-09-22 (19-58-16).txt

Type d’examen: Examen complet (C:|D:|E:|)
Elément(s) analysé(s): 200594
Temps écoulé: 8 minute(s), 42 seconde(s)

Processus mémoire infecté(s): 0
Module(s) mémoire infecté(s): 0
Clé(s) du Registre infectée(s): 0
Valeur(s) du Registre infectée(s): 0
Elément(s) de données du Registre infecté(s): 0
Dossier(s) infecté(s): 0
Fichier(s) infecté(s): 0

Processus mémoire infecté(s):
(Aucun élément nuisible détecté)

Module(s) mémoire infecté(s):
(Aucun élément nuisible détecté)

Clé(s) du Registre infectée(s):
(Aucun élément nuisible détecté)

Valeur(s) du Registre infectée(s):
(Aucun élément nuisible détecté)

Elément(s) de données du Registre infecté(s):
(Aucun élément nuisible détecté)

Dossier(s) infecté(s):
(Aucun élément nuisible détecté)

Fichier(s) infecté(s):
(Aucun élément nuisible détecté)

16

This looks like a Quick Scan was done, but it came up clean (no malware), which is good.

How do you normally connect to the Internet? Cable, DSL, proxy?

When you open the Avast GUI > Settings > Details > Update Parameters…what is checked off (anything or not)?

When you open the Avast GUI > Settings > Details > Proxy Settings…what is checked off (there are 3 buttons: the 1st, 2nd, or 3rd)?

17

I see

Internet Explorer 6.0.2900.5512

IE6 is very old and very vulnerable to attack and should be updated to IE8 as it is much safer and faster.

IE is used everywhere in Windows so it should be at the latest level.
Stay Safer Online
http://www.microsoft.com/windows/internet-explorer/features/safer.aspx

18

Hello SafeSurf,
to answer your questions :

  • I did really a full scan, but as the PC is just installed, there is nothing except XP, Mozilla and Avast, thus the number of file is reduced.
  • I’m connected with an Ethernet cable to my AOL box (ADSL line). No proxy
  • Update parameters : auto update of the virus data base in checked on, ask for program update is checked on
  • proxy settings : automatic detection is checked on

To answer YoKenny, I do not intend to use Internet Explorer 6 (I know it’s obsolete), but Mozilla : so is it important to update IE6 to IE8 anyway ?
Regards,
Chichiviriche

19

Yes and here is why

Windows Explorer is a file manager application that is included with releases of the Microsoft Windows operating system from Windows 95 onwards. It provides a graphical user interface for accessing the file systems. It is also the component of the operating system that presents many user interface items on the monitor such as the taskbar and desktop. Controlling the computer is possible without Windows Explorer running (for example, the File | Run command in Task Manager on NT-derived versions of Windows will function without it, as will commands typed in a command prompt window). It is sometimes referred to as the Windows Shell, explorer.exe, or simply “Explorer”.
http://en.wikipedia.org/wiki/Windows_Explorer

20

You’re confusing Windows Explorer (the Windows GUI) with Internet Explorer (the web browser).