I had the same problem and neorocks solution worked for me.
In my specific case, I removed Micro Trend PC-cillin and then could not connect to the internet, and could not modify network settings. I tried several other solutions but this was the only one that worked. THANKS!
1. Click Start, click Run, type regedit, and then press ENTER.
2. Locate and then click the following registry subkey: HKEY_LOCAL-MACHINE\SYSTEM\CurrentControlSet\Control\Network
3. Right-click this subkey, click Export, and then save the selected branch in a file.
4. Click the Network subkey again, and then delete the Config entry. Do not delete the Network subkey. The Config entry will be reconstructed when you restart the computer.
5. Restart the computer. You may have to manually turn off the computer.
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