If these methods don't work, you can use the Netsh utility to restore the TCP/IP stack to its original configuration when Windows was first installed. The utility restores all registry settings relating to the TCP/IP stack to their original settings, which is effectively the same as removing and reinstalling the protocol . The utility records a log of the changes it makes . For details about this drastic, but effective, solution, see Microsoft Knowledge Base article 299357 (w7io.com/299357).
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