To change your Windows Hello PIN:


Press the windows key or go to the search bar and type "sign in options"



And open the Sign-in options setting


IF YOU REMEMBER YOUR PIN (steps for if you've forgotten below)

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Click the PIN (Windows Hello) option and press change PIN



Then enter your old PIN followed by your new PIN


Make sure to tick the Include letters and symbols option if your PIN includes those




IF YOU DO NOT REMEMBER YOUR PIN

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Ensure that you have your MFA device with you (Phone)


After clicking the PIN (Windows Hello) option 


Select forgot my PIN



And Press Continue



Then enter the MFA number into your Authenticator app on your phone



Then Enter your new PIN twice


Make sure to tick the Include letters and symbols option if your PIN includes those