I have upgraded a couple of machines myself, and the key thing here is to choose the &quot;Upgrade this PC&quot; option on the downloader <i>instead</i> of having it create the installation media. By having it Upgrade using the automated procedure, there is no worry (as long as the host machine&#x27;s Windows is already activated). Nevertheless, you will need to activate Windows 10 after install, which can be done Online or over the phone (talking to a computer). Also, be sure to choose the bit-depth that corresponds to your current Windows -- unfortunately there is no up-bitting (that I am aware of).