The Camera Freeze Bug: Why Apps Lock Up After a Windows 11 Update
Quick answer: A Windows 11 cumulative update (the KB5066835 line) left some systems freezing whenever an app tried to open the camera or microphone. If Teams, Zoom or Chrome hangs the instant your webcam should turn on, this is a known post-update regression, not your camera. Confirm the camera itself still works with a quick webcam test in the browser.
What actually happens
Affected machines don't lose the camera outright. Instead, the app that requests camera or mic access stalls, sometimes taking the whole program down with it. Because it hits at the moment of access, it looks like a hardware fault, which sends people down the wrong repair path entirely.
The fixes that have worked
Start simple. Reboot, then check that camera and microphone privacy are enabled under Settings, Privacy & security. Reinstalling the camera driver from Device Manager clears a corrupted state for some users. If a specific app is the only one freezing, reset or reinstall that app and re-grant its permissions.
For persistent cases, the fix that reliably stuck was an in-place repair install using the latest Windows image, which updates the system files while keeping your apps and settings intact. Several people who waited for a patch ended up resolving it this way rather than clean-installing.
Rule out the camera first
Before you spend an hour on system repair, prove the hardware is fine: open the webcam test, which runs entirely in your browser and shows your camera feed without any app in the middle. If you see yourself there, the camera and its driver are healthy and the freeze is a software regression. If the browser also hangs, follow our guide on a webcam not working in Teams or Zoom to isolate app-versus-system causes.