No internet connection after virus removal

July 15, 2010 at 10:26:54
Specs: Windows XP
After I've removed a virus I've had it took away my internet connection. I've tried many this and programs ipfix blah blah blah. Right now it just says 'Limited or no connectivity' and 'Trying to renew ip address'. For some reason there's a black spot in 'Default Gateway' When I do ipconfig /release it does so successfully but when I do ipconfig /renew it says "An error occurred while renewing interface Local Area Conn ( I changed the name ) : unable to contact your DHCP server. Request has timed out. I used to be connected to a router but now I'm connected to the modem itself.

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July 15, 2010 at 10:46:44
Is this a wireless or wired connection?

Also, you may have damaged driver for your Network Interface Card NIC. Try reinstalling the driver if this is the case. You can find out by going into your device manager and see if there is an exclamation mark next to your network card.

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July 15, 2010 at 10:54:52
There is no exclamation point next to my ethernet nic

I'm hardwired

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July 15, 2010 at 12:17:44
It could be the TCP/IP stack but then again it could be your router. We will start by thinking the problem is in your computer. Try going into the properties of your NIC then remove the TCP/IP protocol and re-adding it. Before you do this make sure you have drivers for the NIC standing by because you may have to uninstall the driver and reinstall it.

If this does not work then I would look at the router as having problems and trouble shoot from there. You could always buy a new NIC and see if it make a difference because they are only like $15. If you had another NIC then you could do a loop back test to verify the problem is not in your computer.

If you hooked a Cross over cabel between the two NICs and got an APIPA address assigned to your IPCONFIG then you would know there is not problems in your computer. If you had a second computer then you could simply hook up a cross-oever between them and see if you can talk to the second computer.

But really, I think the problem is either in your driver or the registry because the virus may have messed with it.

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December 1, 2010 at 07:45:59
I'm having the same problem with one of our machines in a remote office. It's really hard to diagnose and reinstall things like NIC drivers remotely, unless someone has a suggestion?

The issue started like everyone else's. Had a virus on the machine and removed it with Malwarebytes. The network is connected, and file sharing/printer sharing working fine with this PC on the domain, just no internet. I've tried 2 installed clients (IE & Mozilla) as well as a stand alone portable browser. Nothing connects.

Help? =)

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