FireDaemon Zero 2 is a major update of our Session 0 Viewer product. FireDaemon Zero allows you manage interactive FireDaemon Pro and Microsoft Windows services running on Session 0. FireDaemon Zero 2 works with FireDaemon ZeroInput.

Download FireDaemon Zero 2

Please make sure you read the release notes below before upgrading! Your Seesion 0 Viewer 1 license key does not work with Zero 2.

Download FireDaemon Zero x64 2.0.16

For 64-bit Microsoft Windows Operating Systems

January 2019 - 30-Day Trial

Download FireDaemon Zero x86 2.0.16

For 32-bit Microsoft Windows Operating Systems

January 2019 - 30-Day Trial

Buy FireDaemon Zero 2

To buy FireDaemon Zero 2 please visit the store.

FireDaemon Zero 2 Documentation

Please consult the Users Guide. It contains the necessary information on how to install and use FireDaemon Zero.

FireDaemon Zero 2 Release Notes

  • If you have Session 0 Viewer 1.X installed, you will need to obtain a new license key that works with Zero 2. See the Get New License Keys section below.

New Features

  • Product has been renamed from Session 0 Viewer to Zero
  • Updated installer graphics and icons
  • Updated Start Menu resource links
  • Zero Shell task bar is resizable. Size and location is remembered.
  • FireDaemon ZeroInput aware (you can check via FDUI0Control query --fdui0input-state).
  • Maximised windows are returned to their maximised state when restored from their entry in Zero Shell
  • You can use the mouse wheel to scroll through the Zero Shell application list
  • Zero Shell lists the Windows services associated with the process running on Session 0
  • New extensive command line help: FDUI0Control --help
  • Version checking
  • Zero is DPI aware on your logged in session as well as Session 0
  • Audit logging of users taking control of and kicking other users out of Session 0
  • Please consult the Change Log for the list of recent improvements and fixes.

Before Upgrading

Before you consider upgrading to FireDaemon Zero 2, please ensure you have completed the following pre-flight checks:


  • Ensure you backup and/or snapshot your machine.

Get New License Keys

  • Your FireDaemon Session 0 Viewer 1 license key will NOT work with this version
  • FireDaemon Zero 2 and FireDaemon Zero 2 OEM is available on demand to customers with a current Software Assurance contract. Please contact us to obtain your license keys or link to download OEM
  • If you don't have a Software Assurance subscription you can upgrade for 50% off the base license price. Please contact us to obtain your discount coupon.
  • You can purchase new Zero 2 licenses with optional Technical Support and Software Assurance subscriptions via 2Checkout

Check Your Upgrade Path

  • If you currently have Zero 2 installed, your version will be upgraded
  • If you have Session 0 Viewer 1 installed, this product will be removed and replaced with Zero 2
  • Please ensure you upgrade "like for like". If you have the 32-bit version of Zero 2 or Session 0 Viewer installed, then install the 32-bit (x86) version of Zero 2. If you have the 64-bit version of Zero 2 or Session 0 Viewer installed, then install the 64-bit (x64) version of Zero 2.

Windows 10 Version 1803 or later and Server 2019

Microsoft have decided to remove the Interactive Services Detection Service entirely on Windows 10 Version 1803 or later and Server 2019. Hence,  it's no longer possible to actually switch to Session 0 on that OS version. If you are running Windows 10 Version 1709 or earlier versions of Windows then Session 0 access still works as normal. If you have FireDaemon Zero installed and you upgraded to Windows 10 1803, the Interactive Service Detection Service will be preserved, however, when you switch desktop, you will switch to a blank screen. You will need to deploy our ZeroInput driver to resolve this issue.

RDP and Returning from Session 0 on Server 2019

If you RDP into Server 2019 and switch desktop to Session 0 then attempt to switch back to your logged in session - you will always be returned to the Windows login screen. We have no workaround or fix for this at this point in time. Note you do not see this behaviour if you are logged directly into the Windows Server 2019 console.

Deployment Matrix

The table below summarises Zero and ZeroInput compatibility and recommended deployment combinations. Remember to deploy appropriately for your operating system architecture. So if you are deploying Zero and ZeroInput on a 32-bit (x86) operating system ensure you use the x86 Zero installer and x86 ZeroInput driver. The same applies for 64-bit (x64).

Operating System (x86 or x64)Is Zero Supported?Is The UI0Detect Service Present?Can I Deploy Zero?Do I Need To Create The UI0Detect Service?Do I Need To Deploy The  ZeroInput Driver?
Windows VistaNoYesNoNoNo
Server 2008    NoYesNoNoNo
Windows 7YesYesYesNoNo
Server 2008 R2YesYesYesNoNo
Windows 8YesYesYesNoNo
Server 2012YesYesYesNoNo
Windows 8.1YesYesYesNoNo
Server 2012 R2    YesYesYesNoNo
Windows 10 < 1803* **YesYesYesNoYes
Windows 10 >= 1803*YesNoYesYesYes
Server 2016*YesYesYesNoYes
Server 1709, 1809NoNoNoNoNo
Server NanoNoNoNoNoNo
Server 2019YesNoYesYesYes
All other Server Core variantsNoNoNoNoNo

* Availability of UI0Detect (Interactive Services Detection) Service not guaranteed on any future version of Windows 10 and Server 2016

** UI0Detect Service preserved if Zero was deployed on Windows 10 1709 or earlier which is then upgraded to Windows 10 1803 or later

Bugs? Issues? Feature Requests?

Tell us what you think! All feedback gratefully received!


Below is Zero in action! Interactive services are installed with FireDaemon Pro 4. Session 0 keyboard and mouse control handled by FireDaemon ZeroInput. Note that this screenshot is Windows 10 1803 and UI0Detect has been re-created per the ZeroInput documentation.