Guide · 5 min read
Why Windows locks during a Teams or Zoom call
You are still in the meeting. You are not touching the mouse. Windows hits its idle limit, the screen locks, and Teams can mute you and drop the camera.
Short answer
- Windows locks on keyboard and mouse idle. A call, especially a guest meeting or a listen-only Zoom, does not always count as activity.
- When the screen locks, Teams can switch off your camera and mute the mic because it treats the lock as you stepping away.
- Small cursor movement resets that idle timer while you are still in the meeting. It does not unlock a screen you locked yourself.
- Use it only while you are in the room. Walking away with the call still live is a privacy problem, not a feature.
What people actually see
The report is consistent. The meeting is open, nobody has touched the mouse for a few minutes, and Windows applies the inactivity lock. Teams then shows that it switched off the video and muted the mic while you were away.
Listener-only Zoom calls have the same shape. The shared screen goes black because the PC slept or locked. The call itself did not keep the session active.
Why the call does not hold the timer
The Windows idle timer watches input. A meeting app can ask the system to stay awake, and many do while you present or share a camera. Guest Teams meetings and camera-off calls often do not, so a five-minute company policy still fires.
Google Meet in Chrome has a related gap. A call with the camera off is not always treated as active content, so a corporate screensaver can still lock while other people hear you.
What resets the timer
Real input resets it. Mouse Jiggler supplies small cursor movement on a timer you choose, so the idle countdown restarts while you are watching the call, reading notes, or speaking without touching the trackpad.
Power settings and PowerToys Awake can keep the machine from sleeping. They do not, by themselves, create the input the lock policy is counting. On an Intune PC you often cannot change that policy at all.
Where to stop
If you press Windows+L, or you leave the room, the right outcome is a locked screen and a muted mic. Several people on the Microsoft thread want that mute-on-lock behavior for privacy. A jiggler should not be used to keep a call live after you walk away.
Start it when the meeting starts and you are present. Stop it when the meeting ends or you leave the desk.
FAQ
Why did Teams mute me when the screen locked?
Teams treats the Windows lock as you stepping away, and it can turn off the camera and the mic. The lock usually came from the idle timer, not from the call ending.
Will changing the sleep setting fix a company PC?
Often no. Intune and similar tools enforce the idle lock, and PowerToys Awake does not create input. Cursor movement is what resets that timer before the lock.
Should I leave this running after I step out?
No. Use it while you are in the meeting. Lock the PC when you leave, especially in a shared room.