issues after KB5083769 update

Question

Hello

since the KB5083769 update, I can't access to my network devices ( NAS ) in explorer.exe

it has been necessary to uninstall this update to recover this access

thanks to fix this issue

Answer 1

Hi, good day!

I recommend reporting the issue via Feedback Hub app to notify Microsoft.

https://support.microsoft.com/windows/send-feedback-to-microsoft-with-the-feedback-hub-app-f59187f8-8739-22d6-ba93-f66612949332

Once uninstalled, please try to temporarily pause updates to prevent it from reinstalling.

Open Settings > Windows Update > Pause updates > Pause for 1 - 2 weeks

I look forward to your update and am happy to continue working with you until the issue is resolved. If you find the answer helpful, please click "Accept Answer" and consider upvoting it. Otherwise, please keep me posted by clicking "Add comment" below instead of selecting Yes or No.

Answer 2

KB5083769 appears to introduce a networking/authentication change that prevents access to NAS shares, similar to other updates that affect SMB/NTLM behavior.

To work around the issue while keeping the update installed, configure both the NAS and Windows 11 to use modern SMB and NTLM settings instead of uninstalling the update:

1. On the NAS
   • Set the SMB protocol to SMB2 or SMB3 (avoid SMB1).
   • Set authentication to NTLMv2 only if that option exists.
2. On Windows 11 (using Local Security Policy / Group Policy)
   • Open Local Security Policy (secpol.msc) or the equivalent policy editor.
   • Under Security Settings → Local Policies → Security Options:
     • Set Network security: LAN Manager authentication level to NTLMv2 response only.
     • Add the NAS IP address and name to:
       • Network security: Restrict NTLM: Add server exceptions in this domain
       • Network security: Restrict NTLM: Add remote server exceptions for NTLM authentication
3. If Group Policy is not available (Windows 11 Home)
   • Open Registry Editor.
   • Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa.
   • Set LmCompatibilityLevel (DWORD) to 3 (NTLMv2 only).
4. Restart the PC and test access to the NAS again via File Explorer.

If the issue persists even after aligning SMB and NTLM settings, temporarily uninstalling the problematic update is a valid mitigation, but be aware of the security risk and consider reinstalling once a fixed update is available.

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References:

• The System Cannot a domain controller to service the authentication request. Please try again later - Microsoft Q&A
• How to uninstall a Windows Update