Windows 11 KB5074105 Update Triggers Camera and Lock Screen Issues

Microsoft has released the new KB5074105 update for Windows 11 versions 24H2 and 25H2, but early adopters are already reporting problems shortly after installation. The update is listed as having no known issues, yet user feedback suggests otherwise.

Reports are starting to surface only days after rollout, raising concerns for users who installed the update as soon as it became available.

Users report camera failures and lock screen issues after installing KB5074105

According to reporting from Neowin, complaints have appeared on Microsoft Q&A and community forums pointing directly to KB5074105. Several users say their built-in camera begins blinking on and off continuously once the update finishes installing.

In affected systems, camera apps, websites, and video conferencing tools report hardware failure, while no image or video output appears at all. Multiple users confirmed that uninstalling KB5074105 immediately restored normal camera functionality, strongly indicating that the update caused the issue.

Another reported issue involves the Windows 11 lock screen clock widget. One user noted that the clock briefly appears after locking the device, then crashes roughly two seconds later before disappearing entirely.

At this stage, it remains unclear whether uninstalling KB5074105 resolves the lock screen clock problem, as limited reports exist compared to the camera-related failures.

Not all feedback has been negative. Other users report that Windows 11 continues to function normally after installing KB5074105. In these cases, the only noticeable change involved the taskbar taking close to one minute to load after a reboot.

This behavior may relate to background configuration tasks running after the update rather than a permanent bug, as systems appeared stable once the process completed.

KB5074105 is an optional update, not a mandatory security patch, meaning users are not required to install it. Those experiencing issues can uninstall the update through Windows Update history or pause updates to prevent it from reinstalling.

The cautious approach may appeal to users following Microsoft’s recent struggles with post-update bugs. The company recently confirmed that the KB5074109 update caused boot failures on some business PCs, forcing Microsoft to issue a second emergency update to fix Outlook and other critical problems.

For now, users will be watching closely to see whether Microsoft acknowledges these new KB5074105 reports and delivers a follow-up fix.