Thanks to @Neil23, I've got the solution down (I think!😞

Force-quitting Samsung Magician, even including the service, did not work for me until I added the argument -no-sandbox in the Task Scheduler (just add it after the /AUTOHIDE option that's already there). 

1) Hit Start,

2) Search Task Scheduler, open it,

3) Scroll down the list to Samsung Magician, double-click it to open,

4) Click the Actions tab at the top,

5) Then double-click on Start a program

6) Now, in the lower-right, click in the box Add arguments (optional), and after /AUTOHIDE put a space and then -no-sandbox

7) Then click OK,

😎 Then click OK on the next box. 

9) Restart your computer.

Looks like there is another potential issue involving the PATH environment variable being missing, here's the fix if that is the issue, thx @aurum79 :

Change your windows system PATH variable to include the new Samsung Director (C:\Program Files (x86)\Samsung\Samsung Magician). This is done by right clicking on the Start Button, Selecting System from the context menu, choosing Advanced System Settings, going to the Advanced tab, clicking Environment Variables, Clicking on the variable called "Path", then "Edit", selecting "New" and adding the path above