Article ID: 2028504 - View products that this article applies to.
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Symptoms

In Windows 8, Windows 7, Windows Server 2012, Windows Server 2012 R2 or Windows Server 2008 R2, your computer restarts, and a critical error message that resembles the following is recorded in the event log:


Log Name: System
Source: Microsoft-Windows-Kernel-Power
Event ID: 41
Level: Critical
Description:
The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.


The Details tab displays the following information:

EventData
BugcheckCode 0
BugcheckParameter1 0x0
BugcheckParameter2 0x0
BugcheckParameter3 0x0
BugcheckParameter4 0x0
SleepInProgress true
PowerButtonTimestamp 129165039139928187


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2683283
Note The values for the Stop error BugcheckCode and the BugcheckParameters can vary.

More information

The kernel power event ID 41 error occurs when the computer is shut down, or it restarts unexpectedly. When a computer that is running Windows starts, a check is performed to determine whether the computer was shut down cleanly. If the computer was not shut down cleanly, a Kernel Power Event 41 message is generated.

An event 41 is used to report that something unexpected happened that prevented Windows from shutting down correctly. There may be insufficient information to explicitly define what happened. To determine what may have happened and to identify a potential resolution, it is important to know what the computer was doing at the time just before the event occurred.

If event 41 is logged because power to the computer was interrupted, consider obtaining an uninterruptible power supply (UPS) such as a battery backup power supply. An underpowered or failing power supply may cause this behavior. For example, if you added RAM or additional devices or hard disks when this problem began, the power supply may cause the problem.


An event 41 can occur in the following scenarios.

Scenario 1: The computer restarts, and there is a Stop error BugcheckCode in the event data

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Scenario 2: The computer is shut down by pressing and holding the power button

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Scenario 3: The system randomly restarts and no Stop error BugcheckCode is listed, or the computer is completely unresponsive (hard hang)

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Properties

Article ID: 2028504 - Last Review: March 27, 2014 - Revision: 12.0
Applies to
  • Windows 8 Enterprise
  • Windows 8
  • Windows 8 Pro
  • Windows Server 2012 Foundation
  • Windows Server 2012 Standard
  • Windows Server 2012 Datacenter
  • Windows 7 Enterprise
  • Windows 7 Professional
  • Windows 7 Ultimate
  • Windows Web Server 2008 R2
  • Windows Server 2008 R2 Foundation
  • Windows Server 2008 R2 Standard
  • Windows Server 2008 R2 Enterprise
  • Windows Server 2008 R2 Datacenter
  • Microsoft Hyper-V Server 2008 R2
  • Windows HPC Server 2008 R2
  • Windows 8.1
  • Windows 8.1 Enterprise
  • Windows 8.1 Pro
  • Windows Server 2012 R2 Datacenter
  • Windows Server 2012 R2 Foundation
  • Windows Server 2012 R2 Standard
Keywords: 
kbcip KB2028504

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