Source:
http://blogs.msdn.com/taylorb/archive/2008/06/19/hyper-v-will-my-computer-run-hyper-v-detecting-intel-vt-and-amd-v.aspx
Question:
Can my computer run Hyper-V?
Answer:
Hyper-V requires processor virtualization extensions (Intel-VT and AMD-V) and requires those features to be enabled along with the No-Execute (NX) feature. For AMD we also require that the CPU be revision F3 or greater or F2 with additional BIOS support – most of the server OEM’s have the additional BIOS support but not all.
More information / tools to confirm Hyper-V functionality:
For AMD you can download there AMD Virtualization™ Technology and Microsoft® Hyper-V™ System Compatibility Check Utility when you run this it will tell you if your machine supports Hyper-V… If you are buying a new machine a good rule of thumb is that if it’s a Quad core the CPU supports AMD-V, you still need to verify the BIOS will allow you to enable it but a quick call to the vendor should tell you that.
http://www.amd.com/us-en/Processors/TechnicalResources/0,,30_182_871_9033,00.html
For Intel you download there Intel® Processor Identification Utility There are two things that you should check on the CPU Technologies tab look for "Intel® Virtualization Technology” and on the CPUID tab look for “Execute Disable Bit”, however I am not aware of any Virtualization enabled chips that don’t have execute disable… If you are buying a new machine a good rule of thumb is that if it’s a Intel Core2 or better the CPU supports Intel VT, you still need to verify the BIOS will allow you to enable it but a quick call to the vendor should tell you that.
http://www.intel.com/support/processors/tools/piu/
Enabling VT and AMD-V In System BIOS
In the BIOS, look to enable "Virtualization" or "VT" or "EM64T" or "AMD-V" or "SVM". Some vendors use double-negatives in their settings, so be careful: "AMD-V Extension Disable" with a value of "Yes" will disable the extensions!
A hard reboot is necessary after the settings are changed. Power off the system ALL THE WAY OFF and turn it back on.