This user guide will help you to set and change the security key PIN for your security key, for example a YubiKey series 5, and to reset the security key. In this user guide, a YubiKey is managed as an example. It has a sensor (golden area) that you can use to operate the YubiKey.
You only need the security key PIN if you use the YubiKey for Microsoft 365.
At Windows 10 and 11, you can manage your YubiKey via your operating system. Alternatively, YubiKeys can be managed via the methods provided by the manufacturer (e.g. app).