Hyper-V

Operating System: Windows Server 2008 x86

Version
Supported Virtual Processors

Standard
1 or 2

Enterprise
1, 2 or 4

Datacenter
1, 2 or 4

Web
1 or 2

Standard without Hyper-V
1 or 2

Enterprise without Hyper-V
1, 2 or 4

Datacenter without Hyper-V
1, 2 or 4

Click [Start], and then click [Server Manager].

Select [Continue] when the User Account Control window appears.

A x64-based processor. Hyper-V is available in x64-based versions of Windows Server 2008—specifically, the x64-based versions of Windows Server 2008 Standard, Windows Server 2008 Enterprise, and Windows Server 2008 Datacenter.
Hardware-assisted virtualization. This is available in processors that include a virtualization option; specifically, Intel VT or AMD Virtualization (AMD-V).
Hardware Data Execution Protection (DEP) must be available [...]