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

Haven't found a fix but I was asking around and it seems like the only solution now is to have a pc (running win10 or win 11 23h2) in between the cnc and windows 11 pc but I haven't done it yet but if I do I'll update this.