No Internet After Uninstalling Avira Internet Security

[jack019]

Greetings,



I am having an issue with one of client machine where after uninstalling Avira Internet Security , i lost my internet connection . weird thing is that , i can still open one website , but not the rest.

Troubleshooting i did so far :

1. cmd-> netsh winsock reset press Enter

netsh interface ipv4 reset press Enter

netsh interface ipv6 reset press Enter

ipconfig /flushdns press Enter

Restart Computer.



2. Reinstalled NIC network card.

3. System Restore

4. Checked with Other Browsers.



Any help is appreciated.

 

[tomerello]

Can you ping your default gateway?
if not check your TP cable and IP configuration.

 

[gregrocker]

In addition rightclick on the connection icon in System Tray to run its Troubleshooter. Then if necessary type Troubleshoot in Start Search box to run the Internet troubleshooter.

Can you access internet in Safe Mode?

Run the Avira Uninstaller (removal tools) for common antivirus software - ESET Knowledgebase

 

[jack019]

Thanks for your time and replies.

Yes, i can ping to my default gateway .
I have tried running troubleshooter and even used the uninstaller tool but still nothing .
and even in the safe mode , i cant access internet.

 

[tomerello]

Can you ping 8.8.8.8 because if you can the problem is dns setting.
But if you can't ping 8.8.8.8 the problem is your routers connection to internet. Try to restart router or do a new dhcp request.

You can also try to use another router or plug your computer direct into the wall and run ipconfig /release & ipconfig /renew in cmd.

 

[jack019]

thenks tomerello for your reply. I have tried ipconfig /release and ipconfig /renew but it didnt helped.
didnt tried ping to 8.8.8.8 yet (this is something new) , neither restarting the router.

let me try it out tomorrow at office.

 

[gregrocker]

Can you System Restore to before removing Avira and the Internet worked?

Then uninstall using the tool this time.

 

[Layback Bear]

Turn off your modem and router. Shut down your computer.
Reboot your modem and then reboot your router.
Start your computer and see if Windows picks them up.
Sometimes these reboots fixes things and sometimes it don't. It's free to try.

 

[jack019]

The pages which were opening were only a few http and no https of the same website . rest no websites were opening.

no other AV was installed after that as couldnt find the offline trial of avira internet security.

even removed the upperfilter key from registry.

checked and there were no NDIS filter under the network adapter properties available

i tried pinging 8.8.8.8 and it wasnt doing that , so i restarted my router hoping for a reset but still nothing .

on the 2nd pc which started behaving the same after i uninstalled avira from the first PC , i did a system restore today again but even that was not willing to work.



Finally reinstalled Windows . but still , the same situation , can open only certain http pages (but not all http pages, neither any https) :|

how is this even possible !!!!!!! :hmm:

 

[jack019]

could this be some switch issue . can these two pc be connected through same switch ??

 

[jack019]

now there are total 3 PC's which are acting the same once i removed the internet security from one PC .
I think its not a problem with one PC . something went wrong in the network .
Like some filter is applied to the swicht connecting those 3 PC's or something .

 

[gregrocker]

Reset the router/switch to defaults, turn on Hardware Firewall but no other settings variations from default.