This article has been archived. It is offered "as is" and will no longer be updated.
When you try to start Microsoft Windows XP after you use the parallel port to connect a Hewlett Packard (HP) ScanJet 4400 or 4470, the computer may stop responding during startup at a Critical Stop Error.
You may receive the following blue screen error message:
STOP: STOP 0x50 (0xfe9fb004, 0x00000000, 0xfdfbc695, 0x00000000) A fatal system error has occurred.
This issue occurs when HP scanners that do not have a Device ID ROM report an invalid Device ID string when they are queried for a Device ID. Because there is no validation of the device reported ID string length in the driver, the driver reads bytes from the device and overwrites kernel memory until the memory corruption causes the computer to stop responding.
To resolve this problem, obtain the latest service pack for Windows XP. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
322389 How to Obtain the Latest Windows XP Service Pack
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:
Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information. The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.