A Program Stops Responding or CPU Usage Approaches 100 Percent When You Unplug a USB Microphone in Windows 2000 or Windows XP (329078)

SYMPTOMS

When you unplug a Universal Serial Bus (USB) microphone, you may experience any of the following symptoms:

A program that is currently using the microphone (such as Microsoft NetMeeting, GraphEdit from the Microsoft DirectShow SDK, or AmCap from the DirectShow SDK) may stop responding.
Your computer's CPU usage may approach 100 percent.

CAUSE

Microsoft has confirmed that this problem occurs in Windows 2000 if you unplug a microphone that uses the Microsoft Usbaudio.sys driver while the microphone is being used by a program. This problem may also occur in Windows XP.

WORKAROUND

To work around this problem, do not unplug a USB microphone when audio is being played back. You might also be able to work around this problem by installing the DirectX 9.0a End-User Runtime package.

The following file is available for download from the Microsoft Download Center:

Download the DirectX 9.0a End-User Runtime package now.

For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to Obtain Microsoft Support Files from Online Services

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