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I've seen similar questions, but couldn't find any answers for my problem.

I'm using Windows 7 and Wamp for website development, and it was working fine until a couple of days ago. Now it won't let me connect to localhost or 127.0.0.1. My hosts file was missing, so I made a new one with the line "127.0.0.1 localhost".

I'm able to ping localhost and 127.0.0.1 no problem. I used netstat and confirmed that Wamp is using port 80. Wamp says it's online. I have this error message in my Apache error log:

(OS 10038)An operation was attempted on something that is not a socket. : winnt_accept: getsockname error on listening socket, is IPv6 available?

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A couple of things you can try:

  1. Execute netsh winsock reset.

  2. Add ::1 localhost to your hosts file (loopback for IPv6).

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  • That seems to have done the trick, any ideas what caused this problem all the sudden? – Andrew Dec 21 '11 at 18:28
  • Your winsock catalog got modified somehow, but I can't tell you how or why. – Dennis Dec 21 '11 at 18:43
  • Also, I just found out that Windows 7 handles loopback internally, so the localhost entries in your hosts file are obsolete. – Dennis Dec 21 '11 at 18:43

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