windows update KB5120249

I experienced the same issue on my PC.

My system is a Dell XPS 8700 running Windows 10 22H2 with KB5120249 installed. After installing KB5120249, the entire system would freeze approximately 5 minutes after Windows started.

After some investigation, I found that disabling the following scheduled task appears to prevent the freeze on my system:

Microsoft\Windows\PI\Secure-Boot-Update

I disabled it using the following command from an elevated Command Prompt:

schtasks /Change /TN "\Microsoft\Windows\PI\Secure-Boot-Update" /Disable

With this task disabled, my PC no longer freezes after approximately 5 minutes.

I also found something that may help identify the cause. While the system was running normally with the task disabled, manually running the same task with the following command caused the entire PC to freeze immediately:

schtasks /Run /TN "\Microsoft\Windows\PI\Secure-Boot-Update"

I was able to reproduce this immediate freeze multiple times.

Therefore, at least on my Dell XPS 8700, execution of the Secure-Boot-Update scheduled task appears to be the trigger for the system freeze.

Please note that disabling this task may prevent Secure Boot-related servicing or updates, so I consider this a temporary workaround/troubleshooting measure rather than a permanent solution.

I hope this information helps others experiencing the same issue.

Hi

Your test result confirms KB5120249 is causing the freeze:

Clean Windows 10 → stable → install KB5120249 → freeze after 5 minutes → remove KB5120249 → stable again.

Uninstall KB5120249:

Settings → Update & Security → Windows Update → View update history → Uninstall updates → select KB5120249 → Uninstall → Restart

To prevent it from reinstalling automatically, use Microsoft’s Show or Hide Updates troubleshooter:

https://download.microsoft.com/download/f/2/2/f22d5fdb-59cd-4275-8c95-1be17bf70b21/wushowhide.diagcab

Select Hide updates and hide KB5120249.

You can also report this through Feedback Hub: https://aka.ms/feedbackhub

Clean Windows 10 → stable → KB5120249 → freeze ~5 min → remove KB → stable → automatic KB reinstall → freeze ~5 min again.

Hi

Since your computer runs normally before installing KB5120249 and crashes within 5 minutes after the update, the issue is likely related to this update.

You can remove KB5120249 first:

Open Settings → Update & Security → Windows Update

Click View update history → Uninstall updates

Find KB5120249 → right-click it → select Uninstall

Restart the computer

After removal, you can temporarily pause Windows Update to prevent it from being installed again:

Settings → Update & Security → Windows Update → Pause updates

You can also report this issue through Feedback Hub: https://aka.ms/feedbackhub

KB5120249 details: https://support.microsoft.com/help/5120249

If the crash returns, please share the error message or crash code from Event Viewer so we can further check.