You receive an access violation error and the system may appear to become unresponsive when you try to install an update from Windows Update or from Microsoft Update
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Article ID : 927891
Last Review : May 24, 2007
Revision : 10.0
Technical update: May 22, 2007
Microsoft has released a Microsoft Security Advisory on this problem for IT professionals. The security advisory contains additional security-related information about this problem. To view the security advisory, visit the following Microsoft Web site:
Note This article discusses the MSI component fixes only. This fix is one component of a two-part fix that includes a Windows Update client software update. These updates will be deployed automatically using Windows Update in May 2007 and June 2007. However, some customers may select to manually install these updates. To fully address the unresponsive system issue, both this fix for MSI must be installed and the Windows Update client must be updated to version 3.0. When you install the MSI fix and the new client, process-monitoring tools may still show CPU usage at near 100 percent. However, the system should still be responsive and should not lock up. If another task requires CPU cycles, they will be shared. However, if the system is idle, MSI will use the full cycles that are available to complete in the shortest time. If another task is running at the same time as MSI, the system may run slightly more slowly. However, the computer should still be responsive. Remember that you must install the MSI fix and the new client to address unresponsive or locked systems. It is expected that process-monitoring tools may still show CPU usage at near 100 percent, but computer unresponsiveness is not expected. If you watch the process monitor, you may still see CPU usage at near 100 percent during some scans if the computer is otherwise idle. This is expected behavior.
Important Many instances of the Svchost.exe process may be running on a Windows-based computer. These Svchost.exe processes control certain tasks. The software update that is described in this article is only designed to address the problem that is mentioned in the “Symptoms” section. Other problems that you experience with Svchost.exe may require alternative resolutions or troubleshooting steps.