Healthy Unknown Partition type present in Computer Management, Disk Management in Windows XP

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Article ID: 555056 - View products that this article applies to.
Author: Joe Gronlund MVP
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SYMPTOMS

When you try to delete or format this partition, you receive an error message that this partition can not be deleted for formatted, as it is in current use.

CAUSE

The unknown partition is created when third party software, for example "Restore IT" is installed, the software creates an image of the operating system during shutdown onto the unknown partition and is being used by the software, you can not delete or format the partition from within Disk Management as it is in current use. 

RESOLUTION

This behavior is by design, the partition is there for Restore IT to use to store an image of your operating system, you can however remove the unknown partition by performing a complete clean install of Windows XP, removing the unknown partition and partition that Windows XP is installed onto, and use all the free space to install Windows XP onto.

MORE INFORMATION

Using Disk Management in Windows XP for basic disks - http://support.microsoft.com/default.aspx?scid=kb;EN-US;309000
Restore IT Information and Support - http://www.farstone.com/home/en/shtml/FAQVBP.shtml

Properties

Article ID: 555056 - Last Review: February 12, 2004 - Revision: 1.0
APPLIES TO
  • Microsoft Windows XP Professional
  • Microsoft Windows XP Home Edition
  • Microsoft Windows XP Professional
  • unknown KMS 9471
Keywords: 
kbpubtypecca kbpubmvp kbhowto KB555056
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