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#31
Should you ever need to clean install, say onto a new SSD, I'd use the built-in software license manager rather than puts around with the registry to activate Windows 7. You just open an elevated command prompt (run it as administrator) then:
Type: slmgr -ipk product key number (remember to space between slmgr and the command and before the product key).
Press enter.
Type: slmgr -ato and press enter. The -ipk command installs the product key, and the -ato attempts online activation.