Sorry for the late answer. This is not the official support site for end licenses, it’s a site from users for users. We take a look at the Forum whenever we have the time, but the last days we have been pretty busy.
For official support, please use from now on the support form that you can find under Your MySteinberg Account → My Support: Sign in
Now, regarding this case, it’s pretty strange that all three machines show the same behaviour. So I would check the hardware drivers for compatibility with your current Operating System. If that doesn’t help, we need to continue troubleshooting the issue via MySteinberg independently.
Note: Just in case, please install the latest eLicenser Control Center separately as well, that you can download here: http://www.steinberg.net/en/company/technologies/elicenser.html