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How to enable "guest access" on Windows

If you have problems connecting to a VZ-i series scanner on Windows 11, enabling guest access can be a useful workaround.

Starting from Windows 10, version 1709 and Windows Server 2019, SMB2 and SMB3 clients no longer allow the following actions by default:
  • Guest account access to a remote server.
  • Fall back to the Guest account after invalid credentials are provided.

The practical implication for users of RIEGL VZ-i series scanners is that it can be problematic to connect to and browse the internal file system from Windows Explorer, and sometimes when controlling the scanner from RiSCAN PRO, the scan acquisition task will fail.

A workaround has been found to resolve this. This involves enabling guest access, which has some potential security risk - see the information here.

The workaround involves PowerShell.

Open an elevated PowerShell prompt:

Copy the script below and paste it into PowerShell:

Set-SmbClientConfiguration -EnableInsecureGuestLogons $true -Force

Press ENTER to run the script. When it has finished, you will see a new prompt below the pasted script, indicating that it is ready for a new command. You can now close the PowerShell window.

Now try to perform the task on the scanner again.