Today, one of my Windows 7 PC shown the error message, “ERR_NAME_RESOLUTION_FAILED“, when I enter any website using Internet Explorer, Firefox, and Google Chrome. The full error message is 

Error 137 (net::ERR_NAME_RESOLUTION_FAILED): Unknown
The webpage at might be temporarily down or it may have moved permanently to a new web address

I thought it’s caused by DNS Changing virus, so I tried to configure static DNS setting in my network connection’s properties. It didn’t help. I tried to flush my DNS cach using the command IPCONFIG/FlushDNS, it didn’t help either.

The next step, I tried to scan the PC with MalwareBytes and Symantec EndPoint. Those applications only found some bad cookies. They couldn’t help me to resolve the problem.

I even tried to configure the PC to point to my internal proxy server, but it looks like the connection was not established, even to the proxy server. It sounds like a Windows problem, not a virus problem. Usually, when the computer is infected with virus, you still can use a local proxy server to access legitimate websites such as or

Finally, I looked around the internet and found this solution from a user named Pahari, his method helped to me resolve the problem.

Open CMD and type the following command

netsh winsock reset

Even the command asked me to restart my PC, I didn’t, but it works. My Internet Explorer could load websites again.

About The Author

Hao Nguyen

Hao Nguyen

Hello! I'm Hao Nguyen and I'm currently working as a Network Engineer for a small firm in Houston. I enjoy writing technical documents and blog, such as

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