and installation support

If you agree to the licence agreement (opens in a new tab) enter the emailed code and click Go.    Recommended equipment


Chrome  When the download has finished click on its icon to run.
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.
Edge  A yellow warning triangle will replace the download progress bar. Click '...', Keep, Show More v, Keep anyway. This is a recent change in Edge. Our later updates will be digitally signed to avoid this.


If the grey permission popup appears click Run. In the yellow popup click Yes to allow installion, and in up to a minute the Biofield Viewer icon will appear on the desktop. If there's no icon restart the computer and it will appear.
This is a full installer that also updates an earlier version.
If you have a 'Cannot open file' error it is either an incomplete file download or antivirus blocking it. Most of our download files are unique, so no antivirus will have seen the installation file before. Either whitelist the file in the antivirus or suspend the antivirus just while installing.
You may need to enable the camera, guide here.
If you have any issue installing email There is further information below.

Internet edition

This runs on any number of Windows computers and requires an internet connection to start up.
From version 3.5.3 you can have both internet and an offline edition installed with separate desktop shortcuts.

Offline editions

The new offline edition is linked to your computer, and can be moved to another computer in future.
The original offline edition used a USB security key, which we continue to update while the keys are supported by their manufacturer.

Linking to a computer avoids needing a USB key or being online, and when you upgrade to a new computer that can be enabled in the same way. To register: run the internet edition, go to the Info page, click 'Enable offline', and email us for a download code for this computer. Uninstall any USB key version first before installing a computer linked version, in Windows Settings → Apps.

To install the USB key edition first uninstall any computer linked edition as above. For the latest purple body 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 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.

Other questions

The latest information for cameras, lighting and much more is on our Light page for Biofield Viewer using your Light / Biofield Online password.

Recommended computer and video equipment
Camera video doesn't appear
Apple Mac
Where is the downloaded file?
USB security: the program doesn't run
Internet security: the program doesn't run

Installer errors

CONCRT140.dll or MSVCP140.dll or VCRUNTIME140.dll were not found
For previous versions:
'd3dx9_41.dll is either not designed to run on Windows...'
'Cannot load library d3dx9_41.dll'
'Cannot update the program'
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