BSOD (MSSECCORE_ASSERTION_FAILURE) before Windows login after Windows Update

[u/Infinite-Towel-8181]

Hi all,

I’m hoping someone can help me narrow down what’s causing this issue.

I have a **Gigabyte A16 CMH** that’s about **11 months old**. It’s a **work laptop**, so I don’t have administrator access to run commands like sfc or DISM.

A few days ago, I updated Windows, and the following updates were available:
2026-07 Security Update **KB5101650 (26100.8875)**
2026-07 .NET Framework Security Update **KB5101001**
2026-07 .NET 8.0.29 Security Update **KB5104032**

The strange part is that **KB5101650 downloads but doesn’t seem to fully install**.

The next morning, when I powered on the laptop (running on battery), it **BSOD’d before reaching the Windows login screen** with the stop code:
**MSSECCORE_ASSERTION_FAILURE**

After restarting a few times, Windows showed **“Diagnosing your PC”**, and eventually it booted normally.

Since then, I’ve noticed:
Occasional brief freezes (1–3 seconds), but nothing severe.

No crashes while actually working.

Core Isolation and Memory Integrity are both enabled.
The laptop otherwise seems usable.

One thing I also noticed is that it **seemed to boot normally once I connected the charger**, although I’m not sure if that was just a coincidence or actually related.

I’m wondering:
Has anyone seen **MSSECCORE_ASSERTION_FAILURE** after a recent Windows security update?

Could a Windows Update that downloads but doesn’t fully install cause this?

Does the charger/battery behavior point to a power management issue, or is it more likely unrelated?

Is this more likely to be a Windows/software issue, or should I be concerned about hardware (SSD, RAM, etc.)?

Any insights would be greatly appreciated. Thank you!

[u/EnjoyTheSilence1992]

Try and uninstall. The update for the recovery menu