Clean Win 7 install using upgrade key
From
http://www.sevenforums.com/tutorials/31402-clean-install-upgrade-windows-7-version.html
1) Change HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Setup\OOBE\MediaBootInstall from 1 to 0
2) run cmd as Admin and execute the following cmd: slmgr -rearm
3) Restart PC
http://www.sevenforums.com/tutorials/31402-clean-install-upgrade-windows-7-version.html
1) Change HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Setup\OOBE\MediaBootInstall from 1 to 0
2) run cmd as Admin and execute the following cmd: slmgr -rearm
3) Restart PC
