NX Witness Client only runs once. Fails to start again

Answered

Ben

October 22, 2026 02:48

Hi,

We're having issues with the NX Witness client (6.1.2.42921), running on Windows 11 ARM64.

The client will only run once after install and then fail to run again unless the launcher.version file is deleted from the C:\Users\username\AppData\Local\Network Optix\applauncher\default\ folder.

The launcher.version file is then recreated upon launching NX Witness and, once NX Witness is closed again, the client fails to launch another time.

No splash screen. No noticeable services launching. Issue persists after a reboot. Ran sfc & dism clean up etc.

This issue only seems to exist for standard Windows users. The issue does not occur for admin accounts.

Any pointers on how I can resolve this?

Cheers,
Ben

0

• 

  Norman

  • Network Optix team

  October 22, 2026 08:46

  Hi Ben,

  Thanks for bringing this to our attention. Because this issue requires a deeper dive into your specific setup, we highly recommend reaching out to your Authorized Reseller as soon as possible.

  They are best equipped to investigate the root cause of this specific issue and get it resolved or escalated for you.

  Best regards.

  0
• 

  Ben

  October 22, 2026 22:22

  I've reached out our reseller and report back if we're able to resolve it.

  For future me or anyone else who stumbles across this issue - workaround is to run the applauncher.exe or HD Witness.exe directly instead of the HD Witness Launcher.exe

  ----

  Windows 11 ARM64, standard user account, NX Witness Desktop Client 6.1.2.42921.

  HD Witness.exe launches successfully.

  applauncher.exe launches successfully.

  HD Witness Launcher.exe launches successfully when %LOCALAPPDATA%\Network Optix\applauncher\default\launcher.version is missing or contains any version other than 6.1.2.42921.

  On successful launch, launcher.version is changed to 6.1.2.42921.

  Subsequent execution of HD Witness Launcher.exe then silently fails

  Changing or deleting launcher.version immediately allows HD Witness Launcher.exe to launch again.

  This only occurs for standard Windows users. Administrator accounts are unaffected.

  0

Please sign in to leave a comment.