"Virtual PC Could Not Open Its Emulated Ethernet Switch Driver" Error Message After You Install a Virtual PC Update

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导读：
　　This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.
　　Article ID : 824516
　　Last Review : August 4, 2003
　　Revision : 1.0
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　　SYMPTOMS
　　When you start Virtual PC after you install or upgrade Virtual PC, you may receive an error message similar to the following error message on the host PC:
　　Virtual PC could not open its emulated Ethernet switch driver. Virtual switch networking will be disabled. To fix this problem, reenable the Virtual PC Emulated Ethernet Switch service or reinstall Virtual PC.
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本文转自
http://support.microsoft.com/default.aspx?scid=kb;EN-US;Q824516