After updating to Windows 10 v20H2, cannot map network drives

Anonymous
2020-06-20T16:01:30+00:00

Hi,

How can I solve this problem after updating to windows 10 v2004 from v1909, i cannot map network drives/shares anymore, everything was working fine before the update, the shares are located in a windows server v1809.

When i try to connect the shares on map a network drive either using \server_name\share_name or \IP_of_the_Server\share_name using the correct domain\username and password i get a error code 0x80070043, the windows server is a domain controller and the windows 10 is a laptop that is not joined in the domain.

Thanks.

[Moderator Edit: Answers marked in this post reflect work arounds to this problem**]**

Update (2/9/2021): Last year when I posted this problem the solution that i used was to rollback to v1909, so if you're having the same problem this is still the best solution, because it was working fine until today, when on my laptop appears a message box to update windows to a newer version and since i was on my way out and was going to live the laptop on, (i keep come back to read the post but never decided to update and since there was solutions each i now know are not related to my problem), i just click update my BAD, because instead of updating me to v20H2, it updated me to v20H1 and since I was on a roll, I decided to update to v20H2 to see if this was already fixed and no the problem still exist and now I'm stuck with windows v20H2 or v20H1, the windows server is still v1809 with all updates, it's using SMBv3, since Encrypted data is on (i also tried it with Encrypted data off/SMBv2v3 and with SMBv1 ON in both client and server and i get the same network name not found error), and the client is windows 10 v20H2 and it have no mapped network drives and i just can't map any network drive i always get the same error code 0x80070043, i can use RDP, i can access my personal website, i can use FTP each is the workaround that I'm using at the moment, but i just can't map the drives i think that the problem in my case is related to some kind of authentication or secure protocol communication error used in SMB., but keep in mind that when i was using v1909 or previous versions, i had no problem with mapped drives or accessing the server with net use and there are no modifications on the server or network side, the only change is updating the client (my laptop) to a newer windows version after v1909.

So if someone has a solution or some ways of troubleshooting this please share them with me.

Thanks.

Update (2/9/2021): Finally got a solution after having 3 windows installations on the same day, that makes everyone happy, reinstall windows but keep apps and files, voila everything is like it was before and working fine again. :)

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 No comments
Answer accepted by question author
Anonymous
2020-07-30T17:31:26+00:00

SUCCESS! I fixed the problem.

Using regedit I searched for my mapped XP drive, \drive name, and deleted the 4 registry entries found after exporting them just in case.

Rebooted the PC and all is well, File Explorer works and the XP drive is gone.

Re-mapped the XP drive and I can now get to it without problems and all works as it should.

My best guess is some update screwed things up because the drive was mapped and connected when the update installed.

Version 2004 STILL has problems. Please fix it Microsoft if you follow your users problems.

What was the exact keys you modified and is the fix still working?

Yes, it's still working for me.

Computer\HKEY_CURRENT_USER\Network\Z   or your drive letter, I deleted Z.

Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Map Network Drive MRU   and delete the entry, (a, b, etc), for your drive.

Then add the following after remapping your drive or else it will fail to connect after a reboot or shutdown.

[HKEY_CURRENT_USER\Network\Z]

"ProviderFlags"=dword:00000001

Was this answer helpful?

100+ people found this answer helpful.
0 comments No comments
Answer accepted by question author
Anonymous
2020-07-27T13:43:35+00:00

SUCCESS! I fixed the problem.

Using regedit I searched for my mapped XP drive, \drive name, and deleted the 4 registry entries found after exporting them just in case.

Rebooted the PC and all is well, File Explorer works and the XP drive is gone.

Re-mapped the XP drive and I can now get to it without problems and all works as it should.

My best guess is some update screwed things up because the drive was mapped and connected when the update installed.

Version 2004 STILL has problems. Please fix it Microsoft if you follow your users problems.

Was this answer helpful?

10+ people found this answer helpful.
0 comments No comments
Answer accepted by question author
Monkey57 3,535 Reputation points
2020-11-03T02:22:34+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?

7 people found this answer helpful.
0 comments No comments

242 additional answers

Sort by: Most helpful
  1. Anonymous
    2021-03-18T08:00:16+00:00

    (Added on 19 March 2021)

    Successful easy workaround:

    If your settings included the enabling "Turn on fast startup (recommended)" feature, your problem may be easily solved by disabling this feature. You may need to select "Additional Power Settings" from the Power & Sleep dialog to get there.

    Image

    I discovered this by having success with a restart with no adjustments and then concluding there was a fault in the cold startup processes.

    (End of Added section)

    History of my experience:

    I recently updated from Windows 7 Home Edition to Windows 10 Home Edition. The update resulted in installing Windows 10 version 1709. I was thrilled that the update went so smooth (although very long time happening - overnight). I was also quite pleased that the system startup was quite rapid compared to the Windows 7 experience. I am using network drive mapping to a removable external drive on a Windows XP platform and the drive mapping was flawless (3 different shares). I was a happy camper and then a few days after the initial upgrade, the system decided all by itself to upgrade me to the 20H2 version. Then I noticed the drives were not mapping correctly on startup - only one of the 3 mappings were correct. I also noted that opening the file explorer and other utilities seemed a bit slower and trying to map the drives not mapped at startup failed (drive already in use!). I noticed that, if I do a Restart, the problem is resolved, although the restart time is much longer that the initial startup.

    I suspected that it might be because the system was skipping some procedures due to the fast startup. I discovered that Windows 10, when first installed, likes to default to the "Turn on fast startup (recommended" setting in the Power Options/System Settings panel.

    I turned off this option and the startup from a "cold" shutdown takes a bit longer, but the drive mapping problem is gone.

    I am suspecting that between the 1709 version and the 20H2 version someone "dropped the ball" on some of the basic functionality settings of the O/S.

    Added comment:

    P.S. I am not using a file server and so there is no domain controller - the network drive connections are peer connections.

    Was this answer helpful?

    6 people found this answer helpful.
    0 comments No comments
  2. Anonymous
    2020-06-21T17:09:11+00:00

    I revert back to version 1909 and everything is working fine again.

    Was this answer helpful?

    4 people found this answer helpful.
    0 comments No comments