How do I set a Windows 7 Security Policy option to "not defined"?

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I have two identical machines running Windows 7, and I'm trying to replicate the security policy settings of one on the other (these are the settings under secpol.msc).

One machine has a setting Local Policies > Security Options > Network security: LAN Manager authentication level setting of Not Defined. The other has one of the options selected.

How do I reset that option to "Not Defined"? It doesn't appear in the list of options when I open its properties and there's no visible action to clear it.

detly

Posted 2012-03-13T07:15:45.680

Reputation: 463

Answers

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Delete the regkey entry (DWORD) LmCompatibilityLevel under HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\Control\Lsa and reboot.

xander3082

Posted 2012-03-13T07:15:45.680

Reputation: 56

1This also works in Windows 10. (10.0.15063) – Andrew Morton – 2017-10-06T13:59:34.307

Asked: 2012-03-13T07:15:45.680

Viewed: 5 717 times

Active: 2019-06-02T09:14:45.537