Open Software Solutions

When you install Windows Vista Service Pack 1 (SP1) by using Windows Update or by using the automatic updating feature, you may receive the following error:

This issue may occur if you use Dynamic Update to install the May version of the Windows Vista application compatibility update, and then you try to install Windows Vista SP1. The May version of the Windows Vista application compatibility update does not correctly update certain files on the computer. Windows Vista SP1 uses these same files. Because these files are not updated correctly, setup fails.

Note Dynamic Update is a feature in Windows Vista Setup that works with Windows Update to download important fixes and drivers that are necessary for the Setup process.

To resolve this issue, install the latest Windows Vista application compatibility update and then try to install Windows Vista Service Pack 1 again. To do this, follow these steps:

1. Download and install the latest Windows Vista application compatibility update.
   For more information about how to do this, click the following article number to view the article in the Microsoft Knowledge Base:
   953960  (/Feedback.aspx?kbNumber=953960/ ) How to obtain the latest Windows Vista application compatibility update
2. Restart your computer.
3. Try to install Windows Vista Service Pack 1 again.

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base: