Hi, I'm Bernard, a fellow Windows user. I'm happy to help!
When you open the Camera app, is there any particular error message or code? While waiting, kindly follow the steps below:
Check the Camera Privacy:
Go to Settings > Privacy & Security > Camera
Make sure the Camera access is turned on
If the Camera is turned on and still having an issue, kindly follow the steps below:
Rollback Camera driver:
-Press the Windows key + X
-Select Device Manager
-Expand the Camera or Imaging Device
-Look for the Camera driver that was installed
-Right-click and click Update Driver
-Select Browse my computer for drivers
-Click Let me pick from a list of available drivers on my computer
-Choose an old driver or another driver name, then select it and hit next until it installs.
-Restart the PC and check.
Note: If the issue persists, please download and install the BIOS and Camera drivers from your manufacturer's website.
You can also refer to the troubleshooting steps from the link below: