I was about to leave the house when I was explaining
Basically XP mode will have the best compatibility ever. Basically programs running under it will even be in you win7 task bar e.t.c. so basically you will not even notice the virtual machine. Rather than including all the old files from previous windows as part of windows seven they can instead use XP mode and not bother including any backwards compatibility. They are using it this time round however in future it can be used for compatibility with 32bit programs (Win7 is the last version of windows to come with a 32bit version, MS claims anyway). Hopefully MS will create a bloatware OS for backwards compatibility, that way you can run any programs ever.













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