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ITsVISTA KB-Link: KB932007

Error message when you try to upgrade a computer to Windows Vista: “The installed operating system does not support an upgrade to Windows Vista”

When you try to upgrade a computer to Windows Vista, you cannot select the Upgrade option. Also, you receive the following error message in the Install Windows dialog box:

Upgrade has been disabled
- The installed operating system does not support an upgrade to Windows Vista

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB932007.

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