Mailing the story:
Windows 7's 'XP mode' may not work on many PCs
The problem for netbooks is that most run Intel Corp.'s Atom N270 processor, which lacks Intel's VT hardware virtualization. The same goes for the N270's successor, the N280, which only recently began shipping. Lack of hardware virtualization support is also a problem for Intel's Atom CPUs for so-called net-top minidesktop PCs, the 230 and the dual-core 330.