Event ID 41 Kernel Power

have having issues sbs 2011 server. keep on getting below error. there no errors before , error after stating restart not planned. thing new in machine 4 more gb of memory. causing issue?

log name:      system
source:        microsoft-windows-kernel-power
date:          4/3/2013 12:50:39 pm
event id:      41
task category: (63)
level:         critical
keywords:      (2)
user:          system
computer:      ambsbs.ambientenv.local
description:
the system has rebooted without cleanly shutting down first. error caused if system stopped responding, crashed, or lost power unexpectedly.
event xml:
<event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <system>
    <provider name="microsoft-windows-kernel-power" guid="{331c3b3a-2005-44c2-ac5e-77220c37d6b4}" />
    <eventid>41</eventid>
    <version>2</version>
    <level>1</level>
    <task>63</task>
    <opcode>0</opcode>
    <keywords>0x8000000000000002</keywords>
    <timecreated systemtime="2013-04-03t16:50:39.079632400z" />
    <eventrecordid>79508</eventrecordid>
    <correlation />
    <execution processid="4" threadid="8" />
    <channel>system</channel>
    <computer></computer>
    <security userid="s-1-5-18" />
  </system>
  <eventdata>
    <data name="bugcheckcode">0</data>
    <data name="bugcheckparameter1">0x0</data>
    <data name="bugcheckparameter2">0x0</data>
    <data name="bugcheckparameter3">0x0</data>
    <data name="bugcheckparameter4">0x0</data>
    <data name="sleepinprogress">false</data>
    <data name="powerbuttontimestamp">0</data>
  </eventdata>
</event>

hello,

please see http://support.microsoft.com/kb/2028504

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best regards

meinolf weber
mvp, mcp, mcts
microsoft mvp - directory services
my blog: http://msmvps.com/blogs/mweber/

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