* Get the update for supported 32-bit versions of Windows 7
* Get the update for supported 64-bit versions of Windows 7
If your computer supports HAV, but HAV is turned off, we recommend that you turn it on in your computer's basic input/output system (BIOS), instead of installing the update. The steps for doing this vary depending on the BIOS manufacturer. For sample instructions on how to do this, go to the Windows XP Mode and Windows Virtual PC support website.”
Rob
Read more: The blog of Rob Margel - Windows Help