Connects to network, but no internet

Verify the Bios time verses Windows XP time.
They should be an exact match.
If they're off, you could get an error your describing.
I had to do a complete reinstall of Windows XP to include
a complete repartitioning of my C: drive to correct the
problem.

-----Original Message-----
I'm having a problem with a friends computer. The
computer had gotten a few viruses (backdoor.coreflood), I
ran NAV and removed the 3 viruses.

I've also done a repair installation of XP.

Now my problem is I can't do anything on the internet.
I am trying to connect to either my dsl connection (VOL),
or my regular dial-up. Both connections show the
computer authenticating succesfully, and show that I'm
connected, but I can't do anything once I'm online.

I can't get to any websites, I can't even update my NAV
definitions..although with both connections, they show me
being connected.

Any suggestions? Is there anyway I can completely
repair all the network connections in the registry?

Thanks for any help.

.