In order to install the Hasp Device Driver for Windows 8.1 you need the Hasp Dongle Driver. If you're installing 3D Embroidery you'll also need the Vista Dongle Patch. Yes, you'll want the Vista patch for Windows 8.1.

If you're trying to install the Husqvarna 3D Embroidery software under Windows 8.1, check out my full Installing Husqvarna 3D Embroidering on Windows Vista, Windows 7, Windows 8, or Windows 10 page.