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: Newest
  1. Anonymous
    2021-01-24T12:19:59+00:00

    I have the same problem mapping network drives to my Synology NAS in Windows 10 v2004.

    I can map it without issues, but when I restart my computer it will not reconnect. I have to disable the mapping and redo every login session.

    This was not issue with version 1909, so something has gone very wrong here.

    Was this answer helpful?

    0 comments No comments
  2. Anonymous
    2020-12-30T22:08:58+00:00

    hey SD,

    my issue I thought was unique.....

    guess not.

    if I remove the mapped drives to my old Windows 2003 Database Server,

    I have no problem..... so I thought it some how was related to that.

    so I was told or read I needed to check off all the boxes in windows features on the Windows 10 pc under Features > SMB......

    but that did not work on it's own. 

    so I have to manually delete the mapped drives using the command prompt and net use * /delete,

    then reboot,

    then manually map the drives again using the command prompt and net use command

    then make some changes to the registry,

    then reboot,

    seemed to work then.....

    however, if I was to logon to the windows 10 pc as a different users, different profile, I would have  to repeat the steps above for that user profile....

    I still think somehow it is connected to the SMB and the older Windows 2003 Server shares.....

    SS

    Was this answer helpful?

    0 comments No comments