Two consecutive error messages when you try to upgrade a computer that is running Windows Vista: “Upgrade has been disabled” and then “The upgrade cannot be started”
Consider the following scenario:
- You have Windows Vista Home Basic installed on the computer. Or, you have a similar version of Windows Vista installed on the computer.
- Then, you install Windows Vista Service Pack 1 (SP1) on the computer.
- Then, you try to upgrade to a version of Windows Vista that has additional features. For example, you try to upgrade to Windows Vista Ultimate.
- To perform the upgrade, you use Windows Vista media that does not contain the updates that are included in Windows Vista Service Pack 1.
In this scenario, you receive the following error message:
The upgrade cannot be started.
Then, you receive the following error message:
To upgrade, cancel the installation and then choose to upgrade to a version of windows that is more recent than the version you are currently running.
Note: This issue may also occur when you use the Windows Anytime Upgrade feature to upgrade Windows Vista.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB951247.

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