Re: Why do I get a bad feeling about this...
Nehalems (i3,i5,i7) support VT-d, (the point of the article), without VT-d hardware support - Device Guard doesn't work, older processors below Nehalems don't have it.
In terms of Authentec Drivers, they were removed, when Apple removed the Authentec Website (without notice either). HP have switched software, so I very much doubt they will be writing new drivers for Windows 10, for older hardware. Past experience also says it won't happen.