Attached to this article (at the very end) is the script needed to uninstall Heimdal Security Product from a machine.
How to do it:
1. Download the file
2. Right click on it and select Run as Administrator
3. Click on More info if the following window appears:
3. Click on Run anyway
4. In the User Account Control press Yes
5. Wait until the black window of CMD disappears and then Heimdal Security Product is removed.