Nobeltec VNS - Caution Windows 8.1
For those who use Nobeltec's VNS with a dongle be aware that the dongle, thus VNS, will not operate using Windows 8.1 (and some versions of Windows 8).
The dongle does not have a driver which works with Windows 8.1 and neither Nobeltec nor the dongle's manufacture have any intention of supplying one.
I found this out when my Windows Vista computer died and I tried to replace it with a new computer. Fortunately I was able to subsequently buy a refurbished Windows 7 computer and all is well. Otherwise it would have been an expensive upgrade to Nobeltec's new platform.