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

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments
Answer accepted by question author
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.

Was this answer helpful?

20+ people found this answer helpful.
0 comments

246 additional answers

Sort by: Most helpful
Most helpful Newest Oldest
  1. Anonymous
    2020-12-22T20:06:53+00:00

    I think I finally found the fix.  Others online are talking about a registry entry called "ProviderFlags".  Go to HKCU\Network.  Find the drive letter you are having issues mapping.  Add a 32-bit Dword key called "ProviderFlags" and set the value to 1.  Reboot and the issue should go away and start working as normal.

    I have not been able to find an answer as to why this fixes it, but is seems to fix the issue on an individual user account.

    Was this answer helpful?

    4 people found this answer helpful.
    0 comments
  2. Anonymous
    2020-10-13T07:46:36+00:00

    Set DNScache service to "Automatic" start did the trick for me :

    Regedit

    Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Dnscache

    1. Change DWORD "Start" to 2 (Automatic)
    2. Restart PC

    Or by services.msc

    It was set to disabled on the deficient computer but automatic on others working windows 2004 computers.

    Was this answer helpful?

    4 people found this answer helpful.
    0 comments
  3. Anonymous
    2020-08-19T00:44:29+00:00

    Ok this fixes the problem...

    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters]
"AllowInsecureGuestAuth"=dword:1

    The gp setting does nothing.

    Was this answer helpful?

    4 people found this answer helpful.
    0 comments
  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

    Was this answer helpful?

    4 people found this answer helpful.
    0 comments