MS-DOS-based virtual machine CPU usage remains at 99 percent on Virtual Server 2005 (867591)


The information in this article applies to:

  • Microsoft Virtual Server 2005

SYMPTOMS

When you run an MS-DOS-based virtual machine on Microsoft Virtual Server 2005, the Virtual Server 2005 computer CPU usage may run at 99 percent.

CAUSE

This behavior occurs because MS-DOS is an operating system that is designed as a single threaded process that has complete control over the CPU. Therefore, MS-DOS waits in an indefinite loop for user input such as a key press or mouse click.

RESOLUTION

To resolve this behavior, install the DOS Virtual Machine Additions (Dos Virtual Machine Additions.vfd). For additional information about how to install the DOS Virtual Machine Additions, click the following article number to view the article in the Microsoft Knowledge Base:

833146 How to install DOS Virtual Machine Additions to permit additional functionality in an MS-DOS-based virtual machine in Virtual PC 2004

Modification Type:MinorLast Reviewed:11/16/2004
Keywords:kbtshoot kbprb KB867591 kbAudITPRO
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