When you apply ASP.NET hotfixes or updates, the installer may stop and then restart the IIS Admin Service and all dependent services

When you apply ASP.NET hotfixes or updates, the installer may stop and then restart the IIS Admin Service and all dependent services.

When you apply an ASP.NET hotfix or update, the updated DLLs are installed in the global assembly cache (GAC). The updated DLLs may have the same assembly version as the DLLs in the previous build. Additionally, only the file versions of the updated DLLs are incremented. During the installation process, the installer stops any process that is holding open a handle to a DLL that the installer is updating.

Therefore, the installer stops and then restarts the IIS Admin Service. When the installer stops the IIS Admin Service, all dependent processes also stop. For example, the W3wp.exe process and the Aspnet_wp.exe process stop. These process restart when the IIS Admin Service restarts.

For more information about assembly versioning, visit the following Microsoft Developer Network (MSDN) Web site: For more information about how to set assembly attributes, visit the following MSDN Web site: