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In other cases, you must enter the number to license the system and be able to use all the functions. If you use an Outlook account and you already have the password associated, this step will not be necessary. This key is what we must introduce each time we perform a new installation of the operating system. Either because we do not have, nor do we want to have an Outlook account, or because we do not have a connection to the network license server, Having the key of our Windows 10 available is always recommended. Although Microsoft has announced the ability to link a Windows 10 serial number to a user account, there are cases in which we will not be able to use this functionality.
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