The downgrade is allowed but only because the pre-installed OS is Pro. Windows 10 upgrade paths Windows 10 volume license media Windows 10 Subscription Activation. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Table of contents Exit focus mode. Table of contents. Note The reboot requirement for upgrading from Pro to Enterprise was removed in version However, why do some people want to change from Windows 10 Enterprise to Pro?