Server 2008/Windows 7/Samba Unspecified error 80004005

Solution 1:

So the issue seems to have been that secpol was set to Digitally Sign Communications (Always).

To fix: Secpol.msc > Local Policies > Security Options > Microsoft network client: Digitally sign communications (always) => Disable

Thanks.

edit:

as the-wabbit said, it is better to update samba to handle the requirement rather than disable it so as to maintain security.

Solution 2:

Try to to enable only SMB 2 or 3 on server or just on windows client. In the registry set value on 1 for: AllowInsecureGuestAuth in key: HKLM\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters\

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Solution 3:

If the Samba server runs SMBv1, then new machines with Win10 have a problem, since they're missing the SMBv1 client function. To enable that function, follow this guide from windowscentral.com:

1. Open Control Panel (the good old one, not the "touch" version)
2. Click on Programs.
3. Click on Turn Windows features on or off link.
4. Expand the SMB 1.0/CIFS File Sharing Support option.
5. Check the SMB 1.0/CIFS Client option.
6. Click the OK button.
7. Click the Restart now button (restart is really needed since it needs to install the function when turning off the computer)