Error message when you attach a device that loads the Serscan.sys driver to a computer that is running Windows XP SP2, Windows XP SP3, or Windows Server 2003: "DRIVER_VERIFIER_IOMANAGER_VIOLATION (c9)"

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), Windows XP Service Pack 3 (SP3), or Microsoft Windows Server 2003, the system may stop responding. Additionally, you may receive the following error message on a blue screen:This problem occurs when the Verifier.exe utility (Driver Verifier Manager) is turned on.

Windows XP

Hotfix information

A supported hotfix is 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 software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if 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. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To apply this hotfix, you must have Windows XP SP2 or Windows XP SP3 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.

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:

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: