Windows 11 KB5074105 Update Causes Webcam and Lock Screen Issues for Some Users

Microsoft released the KB5074105 update for Windows 11 24H2 and 25H2 just hours ago, but early reports suggest that it’s causing problems on some systems. While the update is designed to fix bugs and improve stability, users on forums and Microsoft Q&A are already reporting issues ranging from non-functional webcams to crashing lock screen widgets.

Webcam Problems Reported After KB5074105

One of the most serious complaints comes from users whose integrated laptop cameras no longer work properly after installing the update. For example, Acer laptop owner Mark S reports that after applying KB5074105:

• The Camera app blinks repeatedly, turning on and off
• Meeting apps and websites report a hardware failure
• No video feed is produced

Mark confirmed that uninstalling the update restores full camera functionality, suggesting KB5074105 is the likely culprit. He has chosen to block the update for now because he relies on the webcam for work.

Lock Screen Clock Crashes

Other users are noticing lock screen issues. User percesus reported that after the update, the lock screen clock disappears about two seconds after appearing. While it’s unclear if uninstalling KB5074105 fixes this issue, the timing points to the update as the probable cause.

Mixed Reports: Taskbar Delays

Some users have not experienced major problems. For instance, forum contributor Davikar said the update installed without critical issues, though the taskbar took roughly one minute to load after reboot. This may simply be part of Windows settling post-update rather than a persistent problem.

Should You Install KB5074105?

January has already been challenging for Windows 11 updates, with multiple users reporting bugs and system instability after Patch Tuesday releases. Because KB5074105 is a C-update (optional, non-security):

• It is not mandatory for security
• You can skip, pause, or uninstall it without putting your system at risk
• Optional updates will not automatically reinstall if you pause them

How to Uninstall KB5074105

If you’ve installed the update and are experiencing issues:

1. Open Settings → Windows Update → Update history
2. Scroll down to Uninstall updates
3. Select KB5074105 and click Uninstall
4. Restart your PC

This can restore affected components like webcams and lock screen widgets to their normal behavior.

Final Thoughts

While KB5074105 addresses minor bugs, early adopters should proceed with caution. If you rely on your laptop camera or lock screen widgets for daily use, consider skipping or pausing the update until Microsoft confirms stability.

As always, back up your system before applying optional updates, and monitor forums and Microsoft Q&A for ongoing reports.