Last May, a few months before Windows 7 was released to manufacturing, I looked at the then-current crop of CPUs available for business PC buyers and identified a potential sticking point: Some of the most popular Intel CPUs available at the time didn’t support hardware-assisted virtualization (HAV). That made them incompatible with the newly announced Windows Virtual PC and Windows XP Mode, a crucial compatibility feature in Windows 7. (For details about Intel CPU support, see “How many Intel CPUs will fail the XP Mode test in Windows 7?” For a closer look at Windows XP Mode, see this video demo.)
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