Norton Causing Shutdown Issues on Two Windows 11 PCs - One 24H2 and one 25H2

Norton 360 for Windows
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On both of my laptops, today especially I have been having hanging shut down and restarting issues. After using the remover tool and removing Norton, the computer could shut down and restart fine.

Fast Startup is off, I have done SFC scannow and Restore Health - these VERY rarely work. The 25H2 laptop is notable due to me fully resetting the PC and still having the problems. The restarts and shut down issues where there since the week of the 21th but really started on the 27th and really started on the 29th. They vary from time to time, probably due to live updates fixing the issue, then going back and starting the issue again. Done multiple scans and found nothing.

This has become very frustrating, especially when you think it’s gone and it comes back. And when I removed Norton, I shut down and restarted over 12 times to test it and they went perfect.

It’s Norton. I miss the old Norton. The old Norton was legit.

Note: The computers do EVENTUALLY restart and shutdown, but they normally don’t take 3-4 minutes, they usually take 4 seconds on the 25h2 and 10 seconds on the 24h2.

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Operating System Details: Windows 11 25H2

Fast Startup is disabled, I’ve run an SFC scan and System Restore – these functions VERY rarely work. The 25H2 laptop is noteworthy because after a complete reset, I’m still having problems. I’ve run several scans and found nothing.

It’s Norton. I miss the old Norton. The old Norton was really good.

Note: The computer FINALLY restarts and shuts down, but it usually takes 3-5 minutes.

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@Bramin Are Windows Updates KB5067035 & KB5067036 installed?

SA

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I don’t know if I have these patches. I know my system is up-to-date and everything is fully up-to-date at the moment.

Are the patches you mentioned supposed to help?

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There are two other updates that were originally listed as affecting provisioned PC’s in corporate environments, that are now affecting user consumer devices as well. Please review the article below. Knowing that these issues began appearing back in September my thoughts are that something released by Microsoft is the actual issue with Norton. The first two that I posted earlier addressed a secure boot certificate expiration. That can affect system at bootup and shutdown respectively. Norton does a startup BIOS scan lasting between 3-5 seconds on all my machines, this is where my concerned thinking is pointing to.

https://www.neowin.net/news/microsoft-admits-major-windows-11-25h2-ui-features-broken-too-alongside-24h2-on-some-pcs/

Quoted from the article:

In our original article, we speculated that alongside Windows 11 24H2, version 25H2 is likely affected too, considering the two versions share the same codebase and the servicing branch. Today, Neowin noticed Microsoft has confirmed that it is indeed the case as the company added that the October 2025 Patch Tuesday for Windows 11 25H2 (KB5066835) had these problems too; they started with the September 2025 preview update (KB5065789). In effect this means the latest Windows 11 update KB5070311 is affected too.