Is the Windows ZeroTier tray app saying “Unknown” for the Node ID? That means the ZeroTier One system service isn’t running for some reason. Here’s how to turn it back on.

1. Open the Start Menu

2. Start typing “services”

3. Open Services (desktop app)

4. Find ZeroTier One at the bottom of the list

5. Start it

If for some reason the tray app still can’t connect, you can still manage your device’s joined networks with :

zerotier-cli