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I just upgraded my home PC to Windows 7 Ultimate 32 bit. After trying various methods to get the Cisco VPN client to work, I gave up and decided to just run it in XP mode. The last steps I tried were in this article ( )

After that, I uninstalled the Cisco client and rebooted. I uninstalled the Deterministic Network Enhancer and rebooted again. Both uninstalled successfully, but now I'm not able to resolve any DNS.

The only way I can resolve DNS is to reinstall the DNE, reboot, and uninstall the DNE. Then I am able to resolve DNS lookups until I reboot again. Once it's rebooted, no more DNS.

Any ideas?

Edit: I completely forgot I'd asked this question until harrymc posted his answer. I've since found out that to fix this problem, I need to disable my Local Area Connection and re-enable it. Once I do that I have no trouble making network connections until the next time I reboot at which point I repeat the process. It's annoying, but manageable since I reboot very infrequently.

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try setting a static IP on your computer with the appropriate DNS server to see if that works.

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You should follow the procedure outlined in Repair & Reset Winsock in Windows 7 which recommends:

  • run a chkdsk /f /r to make sure you don’t have any disk erros
  • run sfc /scannow to validate your system files
  • install latest network drivers

Then use a command prompt run as Administrator and enter :

ipconfig /release
ipconfig /renew
netsh winsock reset catalog
netsh int ip reset reset.log

See also reset Internet Protocol (TCP/IP) that provides a fix-me .exe file.

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