Vista network problem: can't connect to the network

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Guest

My vista has the following problems:

I can't browse any web sites and connect to any IP/address through
IE,Firefox,CuteFTP and other TCP Protocol programs when I stared Vista over
about 8 hours in a sudden, IE repored "Can't find the server" in sudden, even
127.0.0.1 can't be visited.

But another XP-based computer can through Vista's ICS connect to the
Internet when the HOST computer can't connect.

The problem can't solve through disconnect/reconnect/log off, the only way
to solve the problem is restarting the computer.Reinstall Vista/Uncheck the
IPv6 Protocol is without effect.

A Windows XP in the same computer doesn't have the problem.

All of the UDP-based program can connect to the internet. No any report in
Event Viewer.

Network: ADSL (PPPoE by Vista), No virus detected by antivir.
 
Hi

Having a similar problem using Vista Ultimate. On my system, I have a PCI
network adapter and a onboard one.
After booting up, my PPPoE connection is set to dial automatically. At
first, it went just fine but after a while(nothing in particular happened),
it just wouldn't log me in, just kept hanging at the "vefying username and
password"(or other intermediat dialog box).
I tried connecting the LAN cable to my onboard network adapter, redialed
manually the connection, and everything went smooth.
After a reboot, the same thing happened, it wouldn't dial the connection.
Re-started the "process", re-plugged the cable into my PCI network adapter,
redialed, and it worked...and so on and on and on...
This never happened under XP.
Any suggestions ?
 
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