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Windows 7 no internet access

Last response: in Networking
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October 23, 2010 3:18:25 AM

For some odd reason my windows 7 box no longer connects to the internet. It was working just fine then just stopped working about 3 hours ago. I know it is a problem with the system itself as I have a p4 ubuntu box on the same hub and it is working just fine.

I have swapped the cat5 cables around and both work on the ubuntu box. Realtek diag also reports no problems in hardware or with the cable. Also the windows 7 box has normal network access. I can run synergy just fine and browse the network drives and stream content around the network. The main router is an old pentium 3 box running smoothwall and it reports no problems. The problem started out as intermittent and disabling and re-enabling the network adapter would fix it for a while. I have run both anti virus and malware sweeps, both locally and remotely from the ubuntu box and all was clean (I run everything in a sandbox first so my systems are normally clean).

Any ideas on what to do? Side note, I have 4 other computers(1xp, 3 ubuntu) and 2 notebooks(1 xp, 1 ubuntu), all fine with internet access.

The windows 7 box
Windows 7 home pre 64-bit
Intel core i5 750
4gb ddr3 ram
Gigabyte p55a-ud3 motherboard rev 1.0
All driver up to date as of 12 hours ago.
a b $ Windows 7
October 23, 2010 4:51:38 AM

can you ping 206.13.30.12?

can you ping Google? by using ping www.google.com
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October 23, 2010 5:21:50 AM

No

My ubuntu computer can do both.

the windows computer says
206.13.30.12
host unreachable

www.google.com
could not find host.

I know it is a problem within windows because I just booted off a live usb drive and ubuntu 10.10 works great. I guess it's another reason to switch my last 3 windows computers.
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Related resources
a b $ Windows 7
October 23, 2010 6:33:21 AM

are the Proxy Settings enabled under Internet Options?
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October 23, 2010 7:14:07 AM

I have placed a old netgear router between the win 7 box and the rest of the network and now the win 7 box is working?? On another forum it was suggested that smoothwall will not work with windows 7.
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!