Windows Hello, Presence Sensing, and Dynamic Lock (23H2)

Windows 11 version 23H2 includes three features, Windows Hello, Presence Sensing, and Dynamic lock, that work together to make it easier to sign into Windows 11 and then automatically lock the PC when you're done using it. But because each requires unique hardware components, your PC may only offer some of these features.
You will typically only find all three features on premium and business-class PCs.
Windows Hello
Windows Hello is a set of technologies in Windows 11 that seemingly achieves the impossible by making it both easier and more secure to sign into your user account. It does so using a combination of two-step authentication and a biometric authentication type--facial or fingerprint recognition--or PIN.

Windows Hello works with online accounts--Microsoft accounts and work or school accounts--and local accounts, which are sometimes called offline accounts.

A> That said, Windows Hello is more of a convenience than an added measure of security for local accounts because that account type can not take advantage of the two-step authentication protections provided by online accounts.

When you set up Windows 11 on a new or recently reset PC and sign in with a Microsoft account, work or school account, or local account with a password, Windows Setup will prompt you to create a PIN, which is the most basic form of Windows Hello and is supported on all PCs regardless of hardware configuration. This is a requirement: Windows Setup will not continue until you do so.

If your PC supports Windows Hello facial fingerprint recognition, you will likewise be given the option of configuring that during Windows Setup as well. But you can skip by that step if you'd like and configure it later.
Once you're using Windows 11, you can set up and configure Windows Hello in the Settings app. Navigate to Accounts > Sign-in options to see which Windows Hello features are available on your PC.

You will see four options under "Ways to sign in," though it's possible that only some of them will be available on your PC since three of the four require specific hardware components. They are:

Facial recognition (Windows Hello). If your PC includes a webcam with near-infrared (IR) capabilities, you can enroll an IR representation of your face with Windows Hello and automatically sign into Windows when you sit in front of your PC and wake it up. This is the fastest and most convenient form of Windows Hello, but some may prefer the more explicit sign-in provided by Windows Hello fingerprint recognition or PIN.

Fingerprint recognition (Windows Hello). If your PC is equipped with a compatible fingerprint reader, you can use that to sign in to Windows 11 as well. This method provides the same level of biometric security as Windows Hello facial recognition, but it works a little less automatically since you need to find and touch the sensor.

PIN (Windows Hello). You configured this sign-in type when you first set up Windows 11, ...