O Windows 8.1 usa Cliente Hyper ‑ V , não Servidor Hyper-V, usado pelo Windows Server.
E o Hyper ‑ V do cliente não inclui o RemoteFX :
There are some features included in Hyper-V on server that are not included in Client Hyper-V. These include the following:
The Remote FX
capability to virtualize GPUs
Live migration of virtual machines from one host to another
Hyper-V Replica
Virtual Fibre Channel
32-bit SR-IOV networking
Shared .vhdx