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Microsoft allows you to install and use Windows indefinitely without a key. The only limitations are:
Because the "hardware" appeared legitimate, Windows would automatically self-activate, bypassing the need for a retail key or internet validation. The Rise to Fame Windows Loader 2.1.1
: If your Windows 7 has the KB971033 update installed, it may detect the loader. Users often uninstall this specific update to maintain activation. Microsoft allows you to install and use Windows