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Event ID 41 with mismatched CPU stepping levels in Windows Server 2003 and in Windows 2000

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This article was previously published under Q227438

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If the CPUs in your computer are not all at the same stepping level, Windows writes an informational message to the Event log. When this occurs, you do not receive an error message on the screen.

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More information

The information written to the Event log is similar to the sample text below. In the following sample, events 6005 and 6009 indicate that the event log has been started and the revision of Windows 2000 that is in use. The third entry exists if the CPU stepping levels are mismatched. Generally, this is not a problem. But, it is recommended that you contact the OEM (Orginal Equipment Manufacturer) for specific recommendations on operating in a mixed stepping environment.
Event ID Count Component    Message sample                               
I 6005     2   EventLog     The Event log service was started.           

I 6009     2   EventLog     Microsoft (R) Windows 2000 (R) 5.0 2202      
                            Multiprocessor Free.                         

I   41     2   Application  The CPUs in this multiprocessor system are   
               Popup        not all the same revision level.  To use all 
                            processors the operating system restricts    
                            itself to the features of the least capable  
                            processor in the system.  Should problems    
                            occur with this system, contact the CPU      
                            manufacturer to see if this mix of processors
                            is supported.
For more information about using CPUs with different stepping levels, click the following article number to view the article in the Microsoft Knowledge Base:
234556� Description of Windows 2000 support for multiple-CPU computers with mixed stepping levels

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Keywords: KB227438, kbinfo, kbhardware, kbenv

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Article Info
Article ID : 227438
Revision : 11
Created on : 11/26/2007
Published on : 11/26/2007
Exists online : False
Views : 401