Laptop camera software disabled in Win10

When I first got my Surface Book I found this article describing how to disable the cameras on Windows 10 and I did it partly for security and partly because I never use them.

Well now two years later I need to use them for an interview, and can't figure out what I did to disable them. I've read that you can do so in the device manager, but I can't find anything that resembles the cameras in any of the sections of device manager.

I don't know if it makes any difference, but I have a Surface Book as mentioned, with Windows 10.

Thanks for any help