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Microsoft windows 7 is the leading os released by Microsoft, and it was launched to the world lower than Three years after the launch of the horribly slow and memory heavy Windows Vista.

There are actually several programs and applications which will run only on Windows XP, and that is why you'll have to move to XP mode on your own Windows 7 Ultimate Activation Key enabled machine.

Together with these, there are much more problems with Windows 7 Product Key that sometimes cause the machine to crash.

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