Factory Reset, Restore, or Reinstall Microsoft Windows on a Dell computer  https://www.dell.com/support/kbdoc/en-us/000124379/factory-reset-restore-or-reinstall-microsoft-windows-on-a-dell-computer

Change or Reset your PIN in Windows  https://support.microsoft.com/en-us/windows/change-or-reset-your-pin-in-windows-a386c519-3ab2-b873-1e9b-bb228a98b904

@Chino de Oro​ thanks but how would I do this if I only had a pin to log in to the laptop

If you forgot your PIN and need to reset it, you can do so from the Windows sign-in screen. Look below the PIN text box:

• If the option I forgot my PIN is available, select it and follow the instructions to reset your PIN. If there are multiple accounts on the device, choose the one you need to reset. This option is only available for Microsoft accounts, not for local accounts

• If the option I forgot my PIN​​​​​​​ is not available, you must sign in with your password and then reset the PIN from the Settings app. Select Sign-in options and then select Enter your password