Just installed Windows 7 now I can't access the internet

I just installed windows 7 yesterday and the internet was working fine. I wake up and my system is restarted due to a update and now I can't access the internet on this computer. All of my other networked computers can access the internet, but this one can't. I went to troubleshoot internet connection and it says it can't contact the DNS server. I did a system restore on the update and still no luck. This is extremely frustrating!

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