NTLMv2 Secure Authentication method
I have a mixture of Windows XP, Windows Vista Business and now one W7 PCs;now can't connect toour Buffalo NAS server which uses Samba server withmy new Window 7 Home Premium 64bit PC with signon errors.I think it's because Microsoft's default new security policy is to use only NTLMv2 authentication,which Samba 2.x doesn't support.With Vista Business, the secpol.msc program allows you to change thesecurity policy setting, but this program doesn't seem to exit in VistaHome or my new Windows 7.How can I change from NTLMv2 only to Send LM & NTLMfrom my new Windows 7 Home Premium 64bitThanks for any assistance.
October 28th, 2009 10:55pm

Hi, In Windows 7, we can set the following Registry key HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Lsa\LMCompatibilityLevel to 1. For more information, please refer to: LmCompatibilityLevel Thanks. Nicholas Li - MSFT
Free Windows Admin Tool Kit Click here and download it now
October 29th, 2009 6:56am

Many thanks Nicholas for your quick reply, unfortunately I could not locate the "....\LMComtatibilityLevel" key where you indicated. In my OP, Windows 7 Home Premium 64bit, I found it the the following posiion "HKEY_LOCAL_MACHINE\Schema\wcm://Microsoft-Windows-Security-NTLM?version=...........\metadate\elements\LmCompatilityLevel" the data is "(value not set)".Is this the correct position and Key entry for my Windows OP and if so to what should I set the data?Hoping you can help further,Nevio
October 29th, 2009 11:12am

Hi Nevio, If there is no the LMCompatibilityLevel key, please create it as DWord and set the value to 1. Hope this helps. Thanks.Nicholas Li - MSFT
Free Windows Admin Tool Kit Click here and download it now
October 29th, 2009 11:59am

I, too have Windows 7 home Premium and am unable to find "LMCompatibilityLevel" under the registry...I can get as far as the Lsa. Where and how would I create it as DWord if that is the solution?
November 13th, 2009 6:15am

Many thanks Nicholas Li, creating the key and setting the valuie to 1 resolved the issue.Nevio
Free Windows Admin Tool Kit Click here and download it now
November 14th, 2009 1:46pm

Createthe newkey "LMCompatibilityLevel" with a DWord and value of 1 hexwithin the Lsa and that should resolve the problem, it fixed main.Nevio
November 14th, 2009 1:51pm

Hi Nevio, I am very glad to know this is helpful! In the future, if you experience any issues regarding our products or if you have any feedbacks, you are also welcome to post a new thread in our forum. It is always our pleasure to be of assistance. Thanks again. Have a great day!Nicholas Li - MSFT
Free Windows Admin Tool Kit Click here and download it now
November 16th, 2009 7:36am

Dear Mr. Li: I am having trouble installing a HP driver (LaserJet CM1017) for Windows 7, and HP has been less than helpful. Finally, they said to use the drivers for Vista and to set the Compatibility Mode for those modules to Windows Vista, SP2. I did that, and it worked for W7, x86. However, it fails for W7 x64. The printer is accessed via the Lan. The installation searches the network and locates the printer. I then select it. After I click Confirm Printer Settings it fails. It says it cannot find the printer, or a firewall is blocking it. The firewall has been stopped and when I put the IP address of the printer in IE, the printer maintenance page is displayed proving I have access to the printer. I am writing to you as another uses suggested setting LmCompatibilityLevel to "2." That did not work. Do you have any other suggestions. Thank you. Sincerely, Jeff V. Pulver
June 6th, 2010 5:32pm

Hello, I am having a similar issue and I created this “HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Lsa\LMCompatibilityLevel” to “1”. but it did not resolve the issue. My question is, should it just be in the Lsa folder and not one of the many subfolders under this, and does it matter whether it is in capitals or not (In some posts it is LM, in others lm and other Lm) Reply is appreciated.
Free Windows Admin Tool Kit Click here and download it now
December 2nd, 2010 10:29pm

Nicholas, You are "da man"! I was beating my head against the wall for half of the day until I found this post!
March 22nd, 2011 10:24pm

This topic is archived. No further replies will be accepted.

Other recent topics Other recent topics