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: Then, you receive the following error message:

Note This issue may also occur when you use the Windows Anytime Upgrade feature to upgrade Windows Vista.

If you have a version of Windows Vista that has Service Pack 1 installed, you cannot upgrade by using media that does not contain the updates that are included in Service Pack 1.

To resolve this issue, use one of the following methods.

Method 1: Use media that contains the updates that are included in Windows Vista Service Pack 1

To resolve this issue, upgrade the computer by using media that contains the updates that are included in Windows Vista Service Pack 1. To obtain this media, contact your computer's manufacturer. For information about how to contact the computer's manufacturer, click the appropriate article number in the following list to view the article in the Microsoft Knowledge Base:

Method 2: Remove Windows Vista Service Pack 1

If you do not have access to Windows Vista media that contains the updates that are included in Windows Vista Service Pack 1, you must remove the service pack from the computer and then upgrade the computer. To remove the service pack, the method that is described in the "Method 2" section of Microsoft Knowledge Base article 948537. For more information, click the following article number to view the article in the Microsoft Knowledge Base: Note After you upgrade Windows Vista, you must reinstall the service pack. To do this, visit the following Windows Update Web site: For more information, click the following article number to view the article in the Microsoft Knowledge Base: