Cannot access CNC machine network file share after windows 11 24h2 update

Question

Setup.

CNC machine running windows CE 6.0 SMBv1, No password or anything required to access share. Accessing file share with windows 11 laptop (23h2)

Problem.

Laptop updated to 24h2 and can no longer access file share (see error code below)

Steps taken:

rolled back update on laptop used to access file share (works now but need it to work in the new update)

On a different laptop (Version 23h2) I tried to access the share and it worked, I then did a fresh windows 11 24h2 install and did the following.

Enabled SMB 1.0 in windows features tried to connect to share it shows that its mapped but can’t access it.

Error:

“\192.168.0.20\user is not accessible. You might not have permission to use this network resource. contact the administrator of this server to find out if you have access permissions.

The specified server cannot perform the requested operation.”

Troubleshooting attempt 1

Regedit

Followed what someone else said to do on here and did this in Regedit (note Lanman Workstation didn’t exist so I created it)

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\LanmanWorkStation

Created Dword 32 bit and changed value to 1.

tried to access it again and same error.

Restarted pc and tried again still same error.

Deleted the above and restarted PC

(note after restarting I noticed the background was black, tried to access again same error)

Troubleshooting attempt 2

Group Policy

went to: Computer Configuration > Windows Settings > Security Settings > Local Policies > Security Options … Clicked on Microsoft network client: Digitally sign communications (always) and set it to Disabled (Note before it was set to Not Defined)

tried to access, same error.

restarted pc and tried to access, same error.

Troubleshooting attempt 3

Group policy

went to: Computer Configuration > Administrative Templates > Network > Lanman Workstation

and enabled insecure guest logons.

tried to access, same error.

restarted, same error.

Anyone know how to fix this?

Answer 1

I was in the same situation before I found this post and had tried most of those suggestions with no success. I had already remapped a network drive that only worked intermittently. I now have setup a new network location with ftp://my router address/folder/folder. It seems the windows update included large changes to SMB and I think that is the cause. The ftp: setup seems to be working well. I'm using windows 11 pro 24H2. Hope this helps.

Answer 2

Hello,

Based on the error information you provided, I suggest you first make sure that the shared file has the correct share permissions and Ntfs permissions. It is recommended to give the user full control permissions. If the permissions are correct, enable TCP/IP NetBIOS on the computer to see if the problem can be solved. Please refer to the following steps:

1. Go to Start.
2. Go to Search, enter the word Services, and press Enter.
3. Double-click TCP/IP NetBIOS Helper on the right pane, and make sure the Startup type property is set to Automatic.
4. Go to Control Panel > Network and Internet > Network and Sharing Center, select Change adapter settings on the left pane, and then double-click Ethernet.
5. Select Properties and double-click Internet Protocol Version 4 (TCP/IPv4) on the Networking tab.
6. Select Advanced, select Enable NetBIOS over TCP/IP on the WINS tab, and then press Enter.
7. Select OK twice to close the dialog box.

Best Regards

Zunhui

Answer 3

I tried what you said and it didn't work, BUT I used cmd to map the drive and it *kinda* works but its really janky & unstable. net use K: \192.168.0.20\userFor example, when in This PC in file explorer it show the same used and free space as the drive in the laptop

Then when accessing the drive sometimes the files are there but if you refresh or go out and back in it the files will be gone or get this error

Actual drive (taken from production pc)

Answer 4

Hi,

Thank you for your reply.
Based on your understanding of the problem, I recommend trying to reset the network to see if it solves the problem. Please follow the steps below:

1. Select the Start button, and then set your preferences. Select Settings > Network & Internet > Advanced network settings > Reset network. Open Network & Internet status settings
2. On the Network reset screen, select Reset now > Yes to confirm.

Wait for your computer to restart and see if that fixes the problem.

Note: Resetting your network removes any installed network adapters and their settings. After you restart your computer, network adapters are reinstalled and default settings are set.

Regards

Zunhui

Answer 5

I had the same thing happen. Were you able to get this resolved? Would you mind sharing the solution?