Microsoft KB Archive/172652

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Computer with USB Devices Hangs

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Q172652

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The information in this article applies to:


 * Microsoft Windows 95 OEM Service Release, version 2.1

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SYMPTOMS
When you run Windows 95 OEM Service Release version 2.1 on a computer equipped with a Universal Serial Bus (USB) host adapter, the computer may stop responding (hang) in the following situations:


 * If you disable the USB Root Hub device in Device Manager while PC Card sockets are enabled, the computer may hang or a "Fatal Exception 0E" error message may occur.
 * If you suspended and resume the computer while a Logitech USB mouse is attached, the computer may never finish the resume operation.
 * If you rapidly plug and unplug an ALPS USB game pad, the computer may hang or display a fatal exception error message on a blue screen.
 * On a Toshiba portable computer equipped with USB support, if the PC Card controller is set to CardBus mode, and the computer is docked to a port replicator, the computer may hang when you eject it (undock) from the port replicator.

RESOLUTION
A supported fix that corrects this problem is now available from Microsoft, but has not been fully regression tested and should be applied only to systems experiencing this specific problem. To resolve this problem, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web: http://support.microsoft.com/directory/overview.asp This issue is resolved by the following updated file for Windows 95 OEM Service Release 2.1, and later versions of this file:

"OPENHCI.SYS version 4.03.1214 dated 7/17/97 31,248 bytes" Some Toshiba portable computers also require the following updated file for Windows 95 OEM Service Release 2.1:

"CBSS.VXD version 4.00.1117 dated 6/13/97 16,249 bytes"

STATUS
This issue is resolved in Microsoft Windows 98.

MORE INFORMATION
For additional information about USB support in Windows 95, please see the following article in the Microsoft Knowledge Base:

"Q253756 Availability of Universal Serial Bus Support in Windows 95" For additional information about issues resolved by updates to these components, please see the following articles in the Microsoft Knowledge Base:

Q181499 USB Over Current Condition Causes Windows 95 Hang

Q164225 Poor Data Transfer with CardBus Card in Docking Station

Q164224 Inserting PC Card in Dock with CardBus Card May Cause Reboot

Q164223 PC Cards May Not Be Recognized in Docking Station

Q164222 CardBus Card in Docking Station May Not Be Configured

Q163938 Inserting Multifunction PC Card May Hang Computer

Q159543 Intel ProShare PC Card May Hang Computer

Q159492 PC Card Device Not Enumerated When Reinserted

For additional information about Windows 95 updates, please see the following article in the Microsoft Knowledge Base:

"Q161020 Implementing Windows 95 Updates"

Additional query words: 95 oem osr w95hw

Keywords : kbhw osr2 win95

Issue type :

Technology : kbWin95search kbOPKSearch kbWin95OPKOSR210