Microsoft KB Archive/325955

= Installing a Non-Plug and Play Driver for a PCI Device May Cause Problems =

Article ID: 325955

Article Last Modified on 2/1/2007

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APPLIES TO


 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Professional
 * Microsoft Windows 2000 Service Pack 1
 * Microsoft Windows 2000 Service Pack 2
 * Microsoft Windows 2000 Service Pack 3
 * Microsoft Windows 2000 Service Pack 1
 * Microsoft Windows 2000 Service Pack 2
 * Microsoft Windows 2000 Service Pack 3
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Advanced Server

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This article was previously published under Q325955



SYMPTOMS
If you install an older Microsoft Windows NT 4.0 driver for a PCI device that has a Windows 2000 or Windows XP driver currently installed, the resources for the PCI device are reassigned. Reassigning the PCI device's resources to the Windows NT 4.0 driver prevents the Windows 2000 or Windows XP driver from communicating with the device.



CAUSE
The HalAssignSlotResources function that is called by the older driver does not determine whether a Plug and Play device driver is already servicing the device before programming the PCI device.



WORKAROUND
Do not install or start an older non-Plug and Play driver for a PCI device that is already being controlled by a Plug and Play driver.



Window 2000
To resolve this problem, obtain the latest service pack for Microsoft Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 How to Obtain the Latest Windows 2000 Service Pack



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Microsoft Windows 2000 Service Pack 4.

Keywords: kbbug kboswin2000fix kbpending kbwin2ksp4fix KB325955

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