The question to me is whether or not this Kaspersky notification can be safely ignored. In my case, I concluded that the notification pops up due to the Windows task called "\Microsoft\Windows\DeviceDirectoryClient\RegisterUserDevice".
Each time that task runs, Kaspersky pops up the notification about webcam usage.
Now I'm not sure if I can ignore this then.
This may help you. At the bottom of the page it has instructions for the fast startup and how to disable. I have done this myself quite a few months ago.
https://www.howtogeek.com/243901/the-pros-and-cons-of-windows-10s-fast-startup-mode/
Try it and see if it sorts out the problem. You can always re-enable if it does not.
I also found some info about running sfc and DISM to fix system errors.
https://www.howtogeek.com/222532/how-to-repair-corrupted-windows-system-files-with-the-sfc-and-dism-commands/