Webcams no private
Or, here are a couple apps that can help: Want to know whenever an app starts using your camera? Whenever an app tries to use your camera, it'll notify you—letting you quickly disable it in a tap.
The camera will still work by default, but at least you'll get notified that it was turned on.
Now that you know how to keep your mic and camera private, it's time to make sure you have the best tools to make calls online when you need to.
You can even set a hotkey to only enable your mic while you're holding down a hotkey—and to have it disabled the rest of the time, just like a walkie-talkie.
It's a tad hard to see when the mic is muted with a dark Windows 10 taskbar color—but its red icon is glaringly obvious when your mic is enabled, and that's what you want. The free Nir CMD app lets you mute your mic from Windows Command Prompt—and can assign keyboard shortcuts to do it automatically, too.
If you're leading the call and just want to disable your mic when you need to cough or grab a drink, the mode's best.
Then, your mic will always be on—and will be muted as long as you hold down your hotkey.