SMB sharing not working after windows 10 update Build 2004 update

Anonymous
2020-06-20T02:30:38+00:00

Any help is  appreciated

Windows for home | Windows 10 | Internet and connectivity

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Monkey57 3,535 Reputation points
2020-11-03T02:21:51+00:00

Win10 20H2 fixes the issue.

Previously when 2004 broke smb1, I rolled back.

There was no registry change or any other modification made to the system.  After Win10 20H2 upgrade was installed via Windows Updates;  SMB1 worked as it did before the upgrade.

Thank you Microsoft.

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  1. Anonymous
    2020-07-07T12:25:07+00:00

    hey, were are waiting too for that fix.

    Come on MS fix it - unfortunately SMB1 is still alive.

    Shame on us.

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  2. Anonymous
    2020-07-07T14:10:47+00:00

    If you are using Guest account on your NAS, I think you need to change the following key and restart your PC/laptop to get it fixed.

    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters]

    "AllowInsecureGuestAuth"=dword:1

    https://support.microsoft.com/en-us/help/4046019/guest-access-in-smb2-disabled-by-default-in-windows-10-and-windows-ser

    Believe this is for access in the other direction, i..e. allowing anonymous access to Windows shares, not shares on a NAS.

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  3. Anonymous
    2020-07-09T06:57:45+00:00

    Same problem after 2004 w10 update .

    No way to use every workaround found on the web (regedit, re-enable smbv1, blabla).

    Remove update 2004 and the smbv1 restart magically.

    At the moment I've blocked all updates to all clients in the company.

    Smbv1 dead or not, it's in my decision using or not smbv1.

    Waiting for fix.

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  4. Anonymous
    2020-07-09T08:47:01+00:00

    Aside from installing/enabling SMBv1, did you try enabling NTLMv1 too?

    Gpedit.msc -> Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Network Security: LAN Manager authentication level -> set to "Send LM & NTLM - use NTLMv2 session security if negotiated"

    (or from Regedit: HKLM\System\CurrentControlSet\Control\Lsa\LmCompatibilityLevel)

    Clear saved credentials -> reboot -> re-open/re-map target share (enter credentials again if asked)

    Network security: LAN Manager authentication level

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