Microsoft KB Archive/222972

= "No Valid System Partitions Exist" During Setup on Compressed Drive =

Article ID: 222972

Article Last Modified on 2/22/2007

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Professional Edition

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This article was previously published under Q222972



SYMPTOMS
When you are installing or upgrading to Windows 2000, you may receive the following error message even if the boot partition is not compressed:

No valid system partitions exist



CAUSE
This behavior can occur if a drive contains a partition that has been compressed with the compression tools included with Microsoft Windows 95 or Microsoft Windows 98. These compression methods are not supported by Windows 2000. When Setup detects the presence of such a compressed drive, it assumes that any installation would be invalid.



RESOLUTION
Remove compression from all partitions before installing Windows 2000.



STATUS
Microsoft has confirmed this to be a problem in Microsoft Windows 2000.

Additional query words: drivespace doublespace

Keywords: kberrmsg kbprb kbsetup KB222972

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