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Windows 7 can’t see SMB-based network attached storage without a hack

I’m sure it’s all in the name of greater security, but I don’t really care about that. My new Windows 7 studio computer could not back up my projects to my Network Attached Storage (NAS) box. Not a problem in XP, but in Windows 7, no matter what credentials you try, you get an error message “invalid username or password”.

Not very helpful, and in fact, misleading. Here’s what you need to do to enable connectivity:

Windows Control Panel > Administrative Tools > Local Security Policy

Then, in the hierarchical list of options on the left, select Local Policies > Security Options.

On the right side, scroll down the list and configure the following settings:

Network security: LAN Manager authentication level = Send LM & NTLM responses
Network security: Minimum session security for NTLM SSP based (including secure RPC) clients = No minimum (clear both checkboxes)

After this, I rebooted, although that was probably unnecessary.

I can now browse and copy files to the file shares on the NAS box. Hooray! 

(solution obtained from http://www.tomshardware.com/forum/75-63-windows-samba-issue)

1 Comment

  1. Sports Headphones

    I also have this problem with the SMB servers on my Linux box, Mac and cheap NAS. This is really make or break for me, if there’s no fix, I’m going to be sticking with XP, because it has no problems accessing devices running other OSes.

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