Hi. I want to solve a problem with Hyper-V on a Windows 8.1 x64 computer ? My computer has Hyper-V support, but when I enable Hyper-V in Bios, my Network/Lan connections disappear, and when I disable Hyper-V, my network/lan connections are back. It can be another problem, but until now, I didn“t find out, why it happens.