The good old tool msinfo32.exe (System Information) contain some news in Windows 8. Although it’s not anything revolutionary it now show you more information than before. Among other things you can find a row that show you if your computer is running in UEFI mode or legacy (BIOS) mode. You can also see four rows which show you if you can run Client Hyper-V on that particular machine. Go to the start screen and search for msinfo32.exe to start System Information and about about the new extended information about your machine.