Microsoft KB Archive/327947

= 16-Bit PC Card Devices Do Not Work After You Install Windows 2000 Service Pack 3 =

Article ID: 327947

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows 2000 Service Pack 3
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Service Pack 3

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This article was previously published under Q327947



IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry



SYMPTOMS
After you install Windows 2000 with an integrated (slipstreamed) Service Pack 3 (SP3), some 16-bit internal and external PC Card devices devices may stop working correctly. PC Card devices are also known as Personal Computer Memory Card International Association (PCMCIA) devices.



CAUSE
This behavior may occur when the IRQ of your PC Card device is not routed correctly. The following devices are frequently affected by this symptom:
 * Integrated wireless network adapters that are based on PC Card standards.
 * Devices that are used in PC Card slots in desktop computers.

All of these devices require PCI routing. By default, Windows 2000 SP3 turns off PCMCIA-to-PCI IRQ routing.



RESOLUTION
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

To turn on IRQ routing when you are using Windows 2000 SP3, edit the registry. To do so, start Registry Editor, and then view the following key in the registry:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Pcmcia\Parameters

Add the following registry value to this registry key, and then quit Registry Editor:

Value name: DisableIsaToPciRouting

Data type: DWORD

Value data: 0



MORE INFORMATION
This symptom may occur with the Lucent/Orinoco 802.1x wireless network adapter. After you install this adapter, the network appears to be available and the signal strength remains the same. However, the network is unavailable, and the network connection icon has a red &quot;X&quot; over it.

Additional query words: 802.11 wifi wi-fi ieee

Keywords: kbenv kbnetwork kbprb KB327947

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