Error message when you try to install updates on a computer that is running Windows Vista: “WBEM_E_CLASS_HAS_INSTANCES (0×80041026)”
When you try to install updates on a computer that is running Windows Vista, the installation process fails. Additionally, you receive the following error message:
Note: This issue may occur when you try to install Windows Vista Service Pack 1 (SP1).
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB951386.