Hello, 2026-06 Cumulative Update for Windows 10 Version 22H2 for x64-Base Systems and 2026-06 .NET 8.0.28 Security Update for x64 Client were installed on my Windows 10 computer on 6/13/2026. After that update, the computer did not respond the the keyboard or mouse 5 minutes after Windows initialized. It had to be shut down manually using the Power switch. I tried to restart the computer several times and got the same result. I found an article online that explained how to temporarily fix the problem by disabling the Secure-Boot-Update task in the Task Scheduler. After I did that, Windows did not lock up after 5 minutes anymore. However, I'm not sure whether I should leave the Secure-Boot-Update task disabled indefinitely. I enabled it today to see whether there had been a fix pushed by Microsoft, but the computer went back to the original problem, so I disabled the Secure-Boot-Update task again. Is there something I need to do to allow the Secure-Boot Task to work or should I just leave the task disabled indefinitely? Thanks.

Hi JC , I understand why you're hesitant to leave the task disabled permanently. Based on your description, the system becomes stable when the “Secure‑Boot‑Update” task is disabled, but Microsoft's current guidance indicates that this task is responsible for applying Secure Boot certificate updates and should normally remain enabled. If it is disabled, future Secure Boot certificate updates cannot be applied. Since the freeze returns as soon as the task is enabled, this may indicate that the update process is being blocked by the device's firmware rather than the task itself. Microsoft's Secure Boot troubleshooting guidance recommends checking for firmware-related issues and Secure Boot update errors before leaving the task disabled indefinitely. Please try the following: 1, Check whether a BIOS/UEFI firmware update is available from your PC manufacturer. Visit the manufacturer's support website. Search for your exact PC model. Install the latest BIOS/UEFI update available. Secure Boot certificate updates depend on proper firmware support and may fail or repeatedly retry if the firmware cannot process the update correctly. 2, Review Secure Boot-related events. Press Windows + X and select “Event Viewer”. Go to “Windows Logs” > “System”. Look for events from “TPM-WMI” around the time the freeze occurs. Note any Event IDs such as 1795, 1803, or 1801, which can indicate why the Secure Boot update is failing. 3, Confirm whether your device is an older model that no longer receives firmware updates. Microsoft notes that some older devices may be unable to complete certain Secure Boot certificate updates if required OEM firmware support is unavailable If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

See my comment above. The BIOS update for Dell computer is available for download on the Dell Support site.

Windows 10 locks up after 5 minutes after install of 2026-06 cumulative update

Answer accepted by question author

Gabriel 95

Continue to follow https://www.dell.com/community/en/conversations/xps-desktops/xps-8910-and-the-nightmare-of-june-2026-secure-boot-update/6a2f121d172f524e9c53981c

JC 45 Reputation points

2026-07-04T23:28:20.9366667+00:00
Thanks, Gabriel.

The fix for my 12 year old Dell Windows 10 desktop was:

Disable Secure-Boot-Update in the Windows Task Scheduler as explained in step 3 of this article:
https://learn.microsoft.com/en-us/answers/questions/5916965/fix-windows-10-june-update

Update the BIOS. The latest update for my computer was dated 7/31/2019. I normally do driver and BIOS updates when I find out about them, but I had overlooked this one.

Re-enable Secure-Boot-Update in the Windows Task Scheduler.

I hope this helps,

JC

Answer accepted by question author

Anonymous

Hi JC,

I understand why you're hesitant to leave the task disabled permanently. Based on your description, the system becomes stable when the “Secure‑Boot‑Update” task is disabled, but Microsoft's current guidance indicates that this task is responsible for applying Secure Boot certificate updates and should normally remain enabled. If it is disabled, future Secure Boot certificate updates cannot be applied.

Since the freeze returns as soon as the task is enabled, this may indicate that the update process is being blocked by the device's firmware rather than the task itself. Microsoft's Secure Boot troubleshooting guidance recommends checking for firmware-related issues and Secure Boot update errors before leaving the task disabled indefinitely.

Please try the following:

1, Check whether a BIOS/UEFI firmware update is available from your PC manufacturer.

Visit the manufacturer's support website.
Search for your exact PC model.
Install the latest BIOS/UEFI update available.

Secure Boot certificate updates depend on proper firmware support and may fail or repeatedly retry if the firmware cannot process the update correctly.

2, Review Secure Boot-related events.

Press Windows + X and select “Event Viewer”.
Go to “Windows Logs” > “System”.
Look for events from “TPM-WMI” around the time the freeze occurs.
Note any Event IDs such as 1795, 1803, or 1801, which can indicate why the Secure Boot update is failing.

3, Confirm whether your device is an older model that no longer receives firmware updates.

Microsoft notes that some older devices may be unable to complete certain Secure Boot certificate updates if required OEM firmware support is unavailable

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Anonymous

2026-06-30T03:09:50.3833333+00:00

Hi JC,

Have you had the chance to check my answer yet?

Please do keep me updated.
JC 45 Reputation points

2026-06-30T03:38:22.4833333+00:00

Hello Sin-D,

Thanks for your quick response. Per the Dell Support Assist app, there are a lot of drivers that need to be updated, one of which is a BIOS update. This PC runs so slow that it will take hours to install all the updates so I won't be able to complete that until the next weekend. After I install all the updates I'll try enabling the Secure-Boot-Update task and see if the PC doesn't lock up anymore.

Thanks again,

JC
Anonymous

2026-06-30T06:31:17.67+00:00

Hi JC,

I understand, and that sounds like a sensible approach. If the system is currently stable with the Secure-Boot-Update task disabled, I would avoid making additional changes until you have enough time to complete the Dell updates, especially the BIOS update.

The BIOS update is likely the most relevant item here, since Secure Boot updates rely on proper firmware support. Once the Dell updates have been installed, re-enable the Secure-Boot-Update task and monitor whether the 5-minute lockup returns.

For now, using the system with the task temporarily disabled while you prepare for the updates seems reasonable. After you've completed the BIOS and driver updates, please let me know the results. That will help determine whether the issue was related to the firmware or if additional troubleshooting is needed.

Thank you for the update, and I look forward to hearing how it goes after the updates are installed.
Anonymous

2026-07-02T03:20:58.41+00:00

Hi JC,

Have you had the chance to check my answer yet?

Please do keep me updated.
JC 45 Reputation points

2026-07-02T21:50:32.12+00:00

Hello Sin-D

I updated the BIOS last night, rebooted the computer, and then enabled Secure-Boot-Update. Windows 10 doesn't freeze up now, so the problem is solved. I also downloaded and installed "Dell Update Windows Universal Application." The other updates (audio, graphics, etc.) probably aren't really necessary to install but I may install them later.

I find it odd that when I was on the Drivers & Downloads page of Dell Support and clicked "Check For Updates", the result was "Your system is up to date." However, when I clicked "Find other drivers for your system" on that page, the available drivers page indicated that a critical BIOS update was needed. As I said, I downloaded and installed that BIOS update (dated 7/31/2019) last night, and today it is still in the list of available driver updates, and it still indicates Critical.

I bought this Dell Inspiron desktop computer in 2014 and have been using it almost every day since then. However, I bought a Dell Windows 11 laptop a few months ago and this incident forced me to compete the setup/migration on it (which I had been putting off). I will now use that as my main computer but will continue to use the Windows 10 computer now and then for various things.

Thanks for your help!

JC
JC 45 Reputation points

2026-07-02T21:52:38.8366667+00:00

Accepted, see comments above.
Anonymous

2026-07-05T01:15:50.1666667+00:00

Hi JC,

I understand, and thank you for taking the time to come back and share the final resolution.

I'm glad to hear that updating the BIOS resolved the issue and that you were able to re-enable the Secure-Boot-Update task without Windows freezing. Based on your testing, it does appear that the outdated system firmware was preventing the Secure Boot update process from completing correctly, and the BIOS update addressed that problem.

Thank you as well for documenting the steps that worked for your Dell Inspiron system. Your summary may be very helpful to other community members who experience similar symptoms after the June 2026 update, particularly on older Dell hardware.

It's also good to hear that you've completed the migration to your newer Windows 11 laptop while still being able to keep the Windows 10 desktop available for occasional use.

Thank you again for posting the solution and the additional details. I'm glad you were able to get your 2014 Dell system working properly again, and I hope your findings help others who encounter the same issue.

Windows 10 locks up after 5 minutes after install of 2026-06 cumulative update

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