Win 7 x 64 Retail Version: Use on different machines?

box o rocks

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Apr 9, 2012
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I just read the FAQ pertaining to Windows 7 licensing, and I'm still confused. If I buy the retail version (not oem) of Windows 7 x64, can I legally uninstall it from one machine and install it on another machine? If so, how does one uninstall an operating system?