Unable to connect to the Internet - DNS error - Windows 7

Hello

I have a new (3 months) desktop XPS from Dell with Windows 7 (64-bit), the Motorola SBG6580 Wireless Modem/Gateway and Comcast is my ISP.

My computer is connected to a modem with an Ethernet cable. Nothing unusual in the installation program. I just plugged my PC and it worked.

In the last three months everything worked well. Then all of a sudden, from Friday last I can no longer access the internet.

The connection at the bottom right shows that I'm connected, and every few minutes a yellow exclamation icon above him. Some sites Web opens very, very slowly, some are open to all and another just give a straight error that I'm not connected. It's weird - I can connect to the first seconds when I restart the computer and the speed is extremely fast, and then all of a sudden I can't connect.

When I right click on the connection icon for helps out sometimes it says "The DNS does not" and sometimes he can't detect any problem (but I can still access all Web sites).

Now, I also connected with Ethernet cables to the modem game both consoles and they work very well - I can get online, play games, stream movies etc. My wife and I can also connect our iPhones over Wi - Fi, and I can also connect my laptop running Vista by Wi - Fi.

The problem is just the Windows 7 PC.

I already googled the problem and tried all the solutions offered - I rinsed and renewed the DNS using the commands ipconfig, I put the DNS manually but nothing seems to work!

Could this be a virus any? I have McAfee running and I did a scan, but it does not detect. My feeling is that there is a virus which changes the DNS.

Any suggestion on how I can confirm to you, or what other measures can I take?

Thank you!

Hello

 
Perform the steps mentioned below and check if the problem persists.
 
a:  Click on start and then Control Panel.
b: go to work in network and sharing Center and then click on change adapter settings.
c: right click on Local area connection and select Properties.
d:  Select Internet Version 6 protocol, and then click Properties.
e: choose DNS servers obtain address automatically, then press Ok.
f: choose address automatically get IP.
g: repeat the steps for Internet Protocol version 4 as well.
 
Hope that helps.

Tags: Windows

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