Right click on the windows logo on the bottom left corner, click on device manager with your HPT interface plugged in.
Check the USB host and see if the MPVI Interface channel A and B are there without the (!) logo on.
If they are there, you're ready.
If they have the (!) on, just right click and find the drivers.

But yeah, mainly if you had the usb stick in the usb, did the install as they recommend, the drivers should have been installed automatically.