Modern Standby/Hibernate Cause a Silent Power Crash into Shutdown Each Time

Install the latest Windows 11 25H2 cumulative update and retest both Sleep and Hibernate, because build 26200.9711/KB5127648 has been superseded by KB5127936 (build 26200.9818) or later, while Event 41 only records the resulting unclean shutdown and does not identify its cause.^1^^2^

1. Update and run a controlled test

1. Open Settings → Windows Update → Check for updates.
2. Install KB5127936 or any newer cumulative update, then select Start → Power → Restart. Do not test after only shutting down.
3. Open winver and verify the build is 26200.9818 or later.
4. Test separately:
   • Start → Power → Sleep, wait two minutes, then wake it.
   • Start → Power → Hibernate, wait two minutes, then power it on.
5. Record whether one or both transitions still produce Event 41.

KB5127936 is a production-quality preview update, so if it is not offered, install the next normal cumulative update that supersedes it rather than forcing an unrelated workaround.^1^

There is no published 25H2 known-issue entry in the available Microsoft release information that specifically identifies Surface Laptop 7 + Sleep/Hibernate + Event 41.^3^ Therefore, KB5127936 should be treated as the first update boundary to test, not as a documented fix for this exact failure.

2. Reinstall the model-specific Surface package if it persists

Since Fast Startup is already disabled, no peripherals are attached, and the Surface diagnostics have already passed memory, storage, Secure Boot, and driver-health checks, do not repeat those changes.

Reapply the complete Surface Laptop 7 driver/firmware bundle:

1. Determine whether this is the Snapdragon Surface Laptop (7th Edition) or Intel Surface Laptop for Business (7th Edition).
2. Download the matching package from Microsoft’s Surface Laptop driver page.
3. Choose the .msi matching the model and Windows build family. If no exact build exists, Microsoft says to select the closest package whose build number is lower than the installed build.
4. Run the MSI as administrator and restart.
5. Repeat the separate Sleep and Hibernate tests.

The Surface package page lists different downloads for Snapdragon and Intel models; using the wrong edition’s bundle is not appropriate.^4^ Surface firmware cannot be uninstalled or rolled back, so avoid attempting a firmware downgrade.^5^

What the Event 41 fields indicate

Your entry shows:

• BugcheckCode = 0
• PowerButtonTimestamp = 0
• LongPowerButtonPressDetected = false
• ConnectedStandbyInProgress = true
• no BSOD or dump

That places the failure in Microsoft’s Event 41 “zero-value” scenario: Windows either lost execution too quickly to record a Stop error or could not write crash information. Microsoft notes that this pattern commonly points toward a power, firmware, or hardware-level failure, but Event 41 alone cannot distinguish among them.^2^

The BitLocker event after reboot does not establish BitLocker as the cause. The diagnostic tool linked you to a Surface Book 2-specific utility that reports your configuration as unsupported; do not change or decrypt BitLocker solely because of that result.

3. Escalate if the updated clean stack still fails

If both Sleep and Hibernate still shut the laptop down after the Windows update and correct Surface MSI:

1. Save the System event log as EVTX covering one controlled reproduction.
2. Retain the SleepStudy report and note the exact test time. SleepStudy’s exit reason 20 means “Hibernate, or Shutdown,” but it does not identify the component that forced the transition.^6^
3. Open the Surface app → Help & support and request service, stating:
   • reproducible failure from both S0 Modern Standby and S4 Hibernate;
   • Event 41 with zero bugcheck and no long power-button press;
   • no external devices;
   • diagnostics passed memory and storage;
   • latest Windows cumulative update and correct Surface MSI were tested.

Microsoft provides service-order and in-person support paths when Surface troubleshooting does not resolve the fault.^7^

A factory recovery image is the final software-isolation test, not the next routine step: it removes installed applications and may remove personal data. If Microsoft requires it before hardware service, back up the device and use the recovery image for the exact Surface model.^8^

References

1. October 28, 2026 — KB5127936 (OS Builds 26300.9818 and 26200.9818) Preview
2. Event ID 41 The system has rebooted without cleanly shutting down first ...
3. Windows 11, version 25H2 known issues and notifications
4. Download drivers and firmware for Surface Laptop | Microsoft Support
5. [Surface Laptop for Business](https://support.microsoft.com/surface/updates/surface-laptop-7th-edition-update-history)
6. Modern standby SleepStudy
7. Force a shutdown and restart your Surface | Microsoft Support
8. Creating and using a USB recovery drive for Surface | Microsoft Support