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I need written documentation, preferably from Microsoft, that installing Windows XP and newer to USB drives would not be possible, even when in a lab environment.

I am not trying to install from a USB drive. They want me to use USB drives as the primary boot device.

I've looked on Technet, but I couldn't find anything.

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I suppose there's "not possible", "not supported", and "not permitted under the EULA". Which is it that you're looking for? By the way, I don't have the answer to any of those. I'm just suggesting that clarification might be in order. – Dennis Williamson Oct 23 '09 at 3:11

Well, considering it is possible I seriously doubt you're going to find an article saying you can't.

As a side note, Microsoft used to have an article that did say you couldn't do it. But they pulled that because of mounting evidence to the contrary.

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Do you know of any options for installing Vista/7 to a USB drive? – Eric Haskins Oct 22 '09 at 23:03
Sounds to me like you're trying to find a way to convince others that you "need" to upgrade. – John Gardeniers Oct 22 '09 at 23:20

It actually is possible with newer bios'. I've created some boot sticks with UBCDWin that work like a champ.

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