It has been revealed that if you purchase or upgrade to the Ultimate or Professional version of Windows 7 you would have access to the XP mode. This is basically running another version of windows inside windows - i.e. an Operating System inside an operating system. It basically supports a virtualized OS with its own own drivers and hardware allowing users to run programs under Windows XP if they don't run in Windows 7. If you run a big company and are worried that programs won't run in Windows 7, then this is a good compatibility fix. However, it does eat up resources just like any other virtualization software. If you purchased the Starter version, then fear not as there are many other virtalization software out there: VMware, Virtualbox and Virtual PC etc...



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