InstallThe download is a full installer that will update any previous version.
Chrome When the download has finished click on it's icon to run, then see SmartScreen below.
Firefox Click 'Save File' in the popup. Press Ctrl-J to view downloads and when it's complete double click on the installer's icon to run.
The Edge browser is the default with a new computer.
Windows Defender SmartScreen Click 'More info' and 'Run anyway'.
The installer does everything quietly and can take up to a minute. When it finishes there's a shortcut on the desktop to run the program.
Internet editionWhen we send a USB key we'll also email you an internet enabled version that you can use immediately without waiting for delivery. Both versions are identical, with the USB key version allowing you to run the program when offline.
From version 3.5.3 you can have them both installed with their own desktop shortcuts. The latest internet edition is available on request.
Installing the USB software keyThe USB device is a software key, the software needs to be downloaded as it's often updated.
For the latest completely purple USB key Windows will automatically install a driver, either before or after you install the software. Plug it in, and after the "We're setting up Sentinel HL" message wait around 10-20 seconds for "Device is ready, Sentinel HL is set up and ready to go". Then it's ok to run the installed program. On Windows 8 there's instead a progress icon on the Windows taskbar.
The black, or black and purple, USB keys have their driver included in the application installation. Wait for that installation to complete before inserting the USB key.
USB security: the program doesn't run