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Microsoft KB Archive/927436

From BetaArchive Wiki

Article ID: 927436

Article Last Modified on 8/29/2007


  • Microsoft Windows XP Professional
  • Microsoft Windows XP Home Edition
  • Microsoft Windows Server 2003, Standard Edition (32-bit x86)
  • Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)


When you attach a device that loads the Serial Scanner driver (Serscan.sys) to a computer that is running Microsoft Windows XP Service Pack 2 (SP2) or Microsoft Windows Server 2003, the system may stop responding. Additionally, you may receive the following error message on a blue screen:

The IO manager has caught a misbehaving driver.
Arg1: 0000021f, (Non-fatal error) A driver has not filled out a dispatch routine for a required IRP major function. (IRP specified.)
Arg2: f1958e80
Arg3: 87c10f00
Arg4: 00000000

This problem occurs when the Verifier.exe utility (Driver Verifier Manager) is turned on.


Windows XP

Hotfix information

A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:


To apply this hotfix, you must have Windows XP SP2 installed on the computer.

Restart requirement

You must restart your computer after you apply this hotfix. Hotfix replacement information This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

File name File version File size Date Time Platform
Serscan.sys 5.1.2600.3029 7,296 08-Nov-2006 10:30 x86

Windows Server 2003

This update has been superseded by another update. For more information about the replacement fix, click the following article number to view the article in the Microsoft Knowledge Base:

931301 Error message when you attach a device that loads the Serscan.sys driver to a computer that is running Windows XP Service Pack 2: "DRIVER_VERIFIER_IOMANAGER_VIOLATION (c9)


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


When you use the Device Test Manager (DTM) to perform Driver Reliability tests, the Verifier.exe utility may be turned on. These tests include the following:

  • Device Path Exerciser test
  • Common Scenario Stress With I/O test
  • Sleep Stress With I/O test
  • Disable Enable With I/O test

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbwinxpsp2fix kbwinxppresp2fix kbfix kbbug kbhotfixserver kbqfe kbpubtypekc KB927436