If you receive error 80073712 when you try to install Windows Vista updates, the Windows component store is corrupt.
The System Update Readiness Tool for Windows Vista can correct some conditions that cause this error. To use the tool, follow these steps:
Go to the Knowledge Base article
webpage. In the Information for advanced users section, find the Windows edition and system type of your computer, and then click the link to download the System Update Readiness Tool. To find your edition of Windows, see View your computer information.
Run Windows Update again.
Typically, the scan takes 15 minutes or less, but it can take longer on some computers. The Windows Update progress bar is not updated during the scan, and progress can appear to stop at 60% complete. This behavior is expected. The scan is still running and you shouldn't cancel the update.
If the System Update Readiness Tool doesn't fix the problem, you can find other possible solutions in this article
on the Microsoft website.
If you continue to see this error, see this automatic troubleshooter
on the Microsoft Support website, or go to the Microsoft Answers
website for more assistance.
Error codes this applies to: