No Internet After Uninstalling Avira Internet Security

jateen · Jul 10, 2013

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.

Moved from TFI to Computer Help
-ViRGE

John Connor · Jul 10, 2013

Well, you did the right things, I'm stumped as to why you can't get Internet access. There must be a remnant of Avira somewhere. I found this. http://howto-uninstall.windowsunins...-tool-free-antivir-for-windows-removal-guide/

jateen · Jul 10, 2013

Thanks for reply John.

Actually I tried to install avira internet security again , but i was not able to locate the Offline installer for it as there is no internet connection .

BlitzPuppet · Jul 10, 2013

What website is it letting you get to?

What method of internet? Wireless? Ethernet?

Check the drivers under the network card that you are using to access the internet. I know on some of my XP machines here at work I wouldn't be able to access the inter/intranet unless that malfunctioning Kaspersky driver was disabled.

ViRGE · Jul 10, 2013

Have you tried netsh int ip reset. Generally winsock is the right move to make, but in this case it might be helpful to reset the IP stack too.

http://support.microsoft.com/kb/299357

XavierMace · Jul 10, 2013

Have you checked your DNS and Proxy settings yet?

jateen · Jul 11, 2013

Thankyou all for your time and replies .

@BlitzPuppet - Its Naukarigulf.com but again besides its login page , all other pages open. but rest of the sites are not accessible. Its ethernet based connection . And i have uninstalled and reinstalled my ethernet NIC network adapter . Should i need to do something with drivers as well.

@ViRGE - Tried both but no help

@XavierMace - Yep . No Proxy .

Cant even ping to websites .
Although one thing is weird here . Since i have uninstalled Avira from this PC . One other PC in the same network start behaving the same ,ie, no internet , and it didn't even had AVira installed on it. It a totally diff PC with diff users.

John Connor · Jul 11, 2013

jateen said:
Although one thing is weird here . Since i have uninstalled Avira from this PC . One other PC in the same network start behaving the same ,ie, no internet , and it didn't even had AVira installed on it. It a totally diff PC with diff users.

Maybe your router is going bad or needs a firmware update.

Ketchup · Jul 11, 2013

Hello jateen, I would be interested in what you found from the last suggestion over at spiceworks.

Look for an NDIS filter under the network adapter properties. I know Kaspersky installs it by default, not sure about Avira but worth looking into. If it's there delete it.

BlitzPuppet · Jul 11, 2013

ketchup79 said:
Hello jateen, I would be interested in what you found from the last suggestion over at spiceworks.

Yup, that's exactly what I was talking about.

John Connor · Jul 12, 2013

I use Comodo firewall and they too install a diver in the NIC.

jateen · Jul 12, 2013

Thanks for the new ideas guys . would surely implement them tomorrow at work. hope to get it working.

jateen · Jul 15, 2013

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:

John Connor · Jul 16, 2013

Read post #8 again...

jateen · Jul 18, 2013

Thanks John . But i dont think i would be able to do that.
is it something that i can do , or should we need to call a network engineer ?
Also, could this be some switch issue . can these two pc be connected through same switch ??

Ketchup · Jul 18, 2013

Here is what I would do:
1. Go into the BIOS and make sure the network adapter is enabled.
2. If that doesn't work, buy a new network card (they are about $15 I think).
2. If that doesn't work, and if this is a home environment, you may want to tell the client to try a new modem.

jateen · Jul 18, 2013

thanks for the reply but 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 .

Ketchup · Jul 18, 2013

Why don't you give us some more details about the network. I think I can say that most of us will assume you are posting from your house/condo/apartment until you tell us differently.

Are you the network admin?

jateen · Jul 18, 2013

noop .. i am the DBA here . We usually dont get network issues.
sooo,, what kinda information can i provide ?

Ketchup · Jul 18, 2013

Do you guys run a domain or workgroup? Are all the affected computers running on the same switch? Have you been able to remove Avira from any computer and not have issues?

jateen · Jul 18, 2013

We have around 15 PC under same domain (not workgroup) , Avira was installed just on one PC , rest all are having kaspersky antivirus. SO, i removed it from just one PC but dont know how it affected rest 2 PC's which physically run on separate switches, as the lan cable goes to different plugs but i dont know if it works like that but i am assuming they are connected to the router through the same switch .

Sorry if its confusing but i dont have much idea about networking .

jateen · Jul 18, 2013

Also, one of the affected computer if having Kaspersky NDIS filter installed on it .

Ketchup · Jul 18, 2013

jateen said:
Also, one of the affected computer if having Kaspersky NDIS filter installed on it .

And is that filter still present?

http://support.kaspersky.com/8596

jateen · Jul 18, 2013

Maybe , but our license was expired for Kaspersky .
But i guess filter might be playing its role. But thats just one one PC.
Rest 2 PC's dont have any Filters on it .

Even on one , i had formated and reinstalled Windows. Still was showing the same . Thats why i think that it cant be any virus infection .

Ketchup · Jul 18, 2013

jateen said:
Maybe , but our license was expired for Kaspersky .
But i guess filter might be playing its role. But thats just one one PC.
Rest 2 PC's dont have any Filters on it .

Even on one , i had formated and reinstalled Windows. Still was showing the same . Thats why i think that it cant be any virus infection .

I agree. I would really recommend you work with your network admin on this, if you haven't already.

No Internet After Uninstalling Avira Internet Security

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