Wonderful. Found it! You sir are a legend.
I also found this....
Windows 10 Build 10061
Hamachi version 2.2.0.328
Copy the hamdrv.inf file out of the folder where Hamachi is installed and put it on desktop for easy access.
Uninstall Hamachi
Reinstall Hamachi
Wait until Hamachi install gets to the "Status: Installing Network Adapter"
Right click on the copied hamdrv.inf file then left click on install.
You will receive a small window saying that the install was complete (hamdrv.inf)
The install of Hamachi will complete.
Make you normal setup changes (Name, Network, Hide Offline, etc etc)
Thank you again. We will let you all know the results when we call some clients back to have another go.