How to fix face recognition cannot open camera?

Hi Janet. I'm Greg, an installation specialist and 9 year Windows MVP, here to help you.

Here are steps for fixing Windows Hello:

1) Turn off Fast Startup: Go to Settings > System > Power & Sleep > Additional Power Settings > Choose what Power buttons do > Change settings that are unavailable > uncheck Fast Startup.

2) Reset Facial Recognition and/or Fingerprint Options

Go to Settings > Accounts > Sign In Options
Locate Fingerprint or Facial Recognition options and click Remove under them.
After that, click Get Started and follow the on-screen instructions to reset Fingerprint and Facial Recognition.
Reboot your PC if needed.

3) Modify Group Policy Settings (for Pro version only)

Creators Update might have modified some of the crucial settings of Group Policy. Therefore, we would recommend to launch the Group Policy Editor and check/edit the settings related to Windows Hello functionality.

Pres Windows key, type gpedit, and press Enter.
Click on Computer Configuration and open Administrative Templates.
Select Windows Components and open Biometrics.
Click on Facial Features and right-click on Configure enhanced anti-spoofing option.
Select Edit and disable the Configure enhanced anti-spoofing feature.
Reboot your PC.

4) Update drivers

If some of the system drivers, most probably webcam and fingerprint reader drivers, were corrupted during the upgrade process, Windows Hello may fail to perform. To fix that, try to update the corresponding drivers:

Right-click on Windows key and select Device Manager.
Locate the Hello, webcam, and fingerprint drivers individually and right-click on each of them.
Select Remove driver software and wait for the removal to be finished.
Repeat the removal with all Windows Hello related drivers and then reboot your PC.
Once done, open Device Manager, click Action -> Scan for hardware changes.
The system should automatically detect and reinstall the drivers.

5) Run Hardware & Devices Troubleshooter at Settings > Update & Security > Troubleshoot.

6) If this was caused by Windows Updates then you can check which were installed at Settings>Update & Security>Windows Update under Installed Updates, then uninstall them from the link there, and hide with the Hide Updates tool downloaded from here: http://download.microsoft.com/download/f/2/2/f2...

You can also use System Restore to get before the problem began, then check for Updates with the Hide Update tool and hide them: http://home.bt.com/tech-gadgets/computing/how-t...

7) If nothing else helps then run a Fresh Start: https://www.techrepublic.com/article/how-to-use...

I hope this helps. Feel free to ask back any questions and let us know how it goes. I will keep working with you until it's resolved.

________________________________________________________
Standard Disclaimer: There are links to non-Microsoft websites. The pages appear to be providing accurate, safe information. Watch out for ads on the sites that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the sites before you decide to download and install it.