Microsoft KB Archive/161220

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Removing Unknown Device in Device Manager Hangs Computer

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Q161220

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The information in this article applies to:


 * Microsoft Windows 95 OEM Service Release, versions 2, 2.1

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SYMPTOMS
Removing an unknown device from Device Manager may cause the computer to stop responding (hang).

CAUSE
The computer's BIOS does not respond correctly to the device removal, causing the computer to hang.

RESOLUTION
To resolve this issue, use either of the following methods:


 * Contact your computer manufacturer about a possible BIOS upgrade.
 * If your computer has a USB hub, contact your computer manufacturer to obtain the Windows 95 OEM Service Release version 2.1 update.

MORE INFORMATION
This behavior is not unique to any one device or BIOS. When you remove a device from Device Manager, a device removal notification is issued to the BIOS. The BIOS is then responsible for handling this message and acting accordingly (typically doing nothing). However, in certain systems, the BIOS is left in an unknown state and eventually hangs the computer.

For information about troubleshooting unknown devices, please see the following article in the Microsoft Knowledge Base:

"Q161102 Removing 'Unknown Device' Network Adapter Hangs Computer" Additional query words: 95

Keywords : osr2 win95

Issue type :

Technology : kbWin95search kbOPKSearch kbWin95OPKOSR2 kbWin95OPKOSR210