Microsoft KB Archive/930889

= You cannot upgrade a Windows-based computer to Windows Vista successfully, and the computer does not rollback to the original operating system =

Article ID: 930889

Article Last Modified on 3/17/2007

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APPLIES TO


 * Windows Vista Business
 * Windows Vista Enterprise
 * Windows Vista Home Premium
 * Windows Vista Home Basic
 * Windows Vista Ultimate
 * Windows Vista Business 64-bit edition
 * Windows Vista Enterprise 64-bit edition
 * Windows Vista Home Premium 64-bit edition
 * Windows Vista Home Basic 64-bit edition
 * Windows Vista Ultimate 64-bit edition
 * Windows Vista Starter

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SYMPTOMS
When you try to upgrade a Windows-based computer to Windows Vista from an earlier version of Windows, the upgrade process is unsuccessful for either hardware or software reasons. Then, the computer does not rollback to the original operating system. Additionally, the computer may restart continuously.



CAUSE
This problem occurs because the rollback process does not initiate automatically after the upgrade process is unsuccessful.



RESOLUTION
To resolve this problem, press the DOWN ARROW key, and then select the Windows Setup Rollback entry from the menu options when the computer restarts.



MORE INFORMATION
This article may mostly describe the Windows Vista installation problem for single-boot systems. For more information about the unsuccessful installation of Windows Vista on dual-boot systems, click the following article number to view the article in the Microsoft Knowledge Base:

930132 The computer continuously restarts after you unsuccessfully try to install Windows Vista on a Windows-based computer

Keywords: kbexpertisebeginner kbtshoot kbprb KB930889

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