Cannot reset winsock, isatap yellow exclamation, no wireless or internet

Have a wireless card that doesn’t see the wireless?  Does checking the Device Manager show a yellow exclamation mark on the isatap or Teredo Tunneling Pseudo Interface?

Always backup your computer before performing advanced commands.


  1. Load the latest driver for the wireless or Ethernet card.
  2. Reboot if necessary
  3. Go to the properties of the nic card with a problem.  Uncheck IPv6 protocol.   You can check this later after the repair. Close the properties Windows
  4. Go to the Device Manager
  5. Double click on the isatap with a yellow exclamation, click update driver, browse my computer, select next (the driver will be highlighted) and follow through to the finish.
  6. Right Click and remove the Teredo Tunneling Pseudo Interface if it is there.
  7. Open a command prompt as an administrator
  8. Type netsh int ipv4 reset c:\resetlog.txt – hit the enter key    – Do not reboot  –
    Did you have an error that looks like this?  If so, you must modify your registry (see error list below)
    If not, continue to step 9

  9. Type netsh reset winsock catalog  – reboot


Error list  – Resetting the winsock and TCP/IP stack

If you type the following and receive an error –

netsh int ipv4 reset
netsh reset winsock catalog

Remove any antivirus solution you may have.  Often these will prevent the winsock from being modified.  Use removal tools as necessary.

Next find the following key by opening the registry editor (regedit at the run line)


You may see more than one “26” key – if so, look for all of the 26 values under the keys and perform the following action on each

Right click on the “26” key, choose “Permissions”, add a checkmark on “Full control” for the everyone group.

Close the registry editor.

Now for a full reset – Open a command prompt as an admistrator –
netsh int ip reset 


  • ipconfig /flushdns
  • nbtstat -R
  • nbtstat -RR
  • netsh int ipv4 reset
  • netsh winsock reset catalog
This will rebuild the tcp/ip protocol stack (fully)


Hopefully you have a connection.   Make sure you reload your antivirus software.


About TCAT Shelbyville IT Department

The Tennessee College of Applied Technology - is one of 46 institutions in the Tennessee Board of Regents System, the seventh largest system of higher education in the nation. This system comprises six universities, fourteen community colleges, and twenty-six Applied Technology Colleges.
This entry was posted in Computers, Home Networking, Information Technology, network, Networking, Windows and tagged , , , , . Bookmark the permalink.

One Response to Cannot reset winsock, isatap yellow exclamation, no wireless or internet

  1. Reblogged this on TCAT Shelbyville – Technical Blog and commented:

    A reminder that IT can be tough

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