Windows 7′s “XP Mode” will not run on some CPUs
If you are planning to use Windows 7′s XP Mode on your new laptop, you had better check your specs because many 
big-name, Intel-powered notebooks including Asus, Dell Studio, HP Pavillion, Sony Vaio, and Toshiba Satellite models may not have what it takes to run Window 7′s XP mode.
Published in the recent Windows 7 release candidate, XP Mode allows XP-specific applications to run inside Professional, Ultimate and Enterprise versions of Windows 7. Microsoft included XP mode to tempt business customers to upgrade to Windows 7 even if they were using custom-made programs that run only on XP.
For you to run XP Mode, your Intel-powered computer must support Intel Virtualization Technology. The trouble is, many Intel laptops found on retail shelves are not packing Intel VT.
Affected chips include Intel Celeron, Pentium Dual-Core, Pentium M, and Atom 270 and 280 processors. If you have a Pentium D, Core, or Core 2 Duo chip you’ll need to check your model number because P7350/7450, T1350, T2050/2250, T2300E/2350/2450, T5200/5250/5270/5300/5450/5470/5550/5670/5750/5800/5850/5870/5900 and T6400/6570 do not support VT, according to ZDNet. AMD-powered computers may also find difficulties running XP mode since Sempron processors and some Athlon 64 chips don’t support virtualization.
Gamers must take note that XP mode was not built to support video games. If you are a part of the XP-specific minority running a custom application or another XP-specific program, you’d better make sure your processor supports virtualization before making the switch to Windows 7.
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