Perflib_Perfdataxxx.dat Files Accumulate Under %SystemRoot%\System32

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Article ID: 285798 - View products that this article applies to.
This article was previously published under Q285798
This article applies to Windows 2000. Support for Windows 2000 ends on July 13, 2010. The Windows 2000 End-of-Support Solution Center is a starting point for planning your migration strategy from Windows 2000. For more information see the Microsoft Support Lifecycle Policy.
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Files with the name Perflib_Perfdataxxx.dat may accumulate under the %SystemRoot%\System32 folder, where xxx is a random number.


These files are generated by processes in the normal course of operation; however, files are orphaned when you do not shut down a computer properly, such as by pressing the power button on a computer.

Note: It is also possible that these files can be orphaned while a server is running. Microsoft is researching this problem and will post more information in this article when the information becomes available.

To delete the orphaned files, you can use an automated logon script.


Article ID: 285798 - Last Review: March 1, 2007 - Revision: 3.5
  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Professional Edition
  • Microsoft Windows 2000 Datacenter Server
kbenv kbfile kbinfo KB285798

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