Hello,
Based on your description, this issue may be related to compatibility between the Windows 24H2 update and the biometric drivers on your Lenovo device.
Here are a few steps you can try:
Open Device Manager, expand Biometric Devices, and update or reinstall the facial recognition driver.
Visit Lenovo Support to check for updated drivers or firmware specific to your laptop model: Lenovo Camera Issue After Update.
If the issue persists, consider rolling back the update or disabling Fast Startup via Control Panel > Power Options.
Microsoft is actively reviewing feedback related to Windows Hello behavior in 24H2. We recommend monitoring the Windows release health dashboard for future fixes.
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Best regards,
Quinnie Quoc.