How to Stop Windows Installer Service
The Windows Installer service is a background process that manages installing, uninstalling and updating the software on a Windows computer. This service is designed to stop itself to conserve system resources whenever it is inactive for ten minutes. However, in rare instances, you may check the running services on your computer and find that the Windows Installer service is running when you do not want it to be. If this is the case, you can use the Windows Services screen to stop the Windows Installer service manually.
Click the Windows logo at the bottom of the screen, and then click "Control Panel."
Click the pull-down menu at the top of the window next to "View by," and select "Small icons." You can change the menu back to "Category" after completing the steps in this article, if desired.
Click the "Administrative Tools" icon.
Double-click the "Services" icon.
Scroll down the list of services until you find "Windows Installer" listed under the "Name" column. Double-click "Windows Installer."
Click the "Stop" button. Windows stops the Windows Installer service.
Click the "OK" button, and close any remaining open windows to return to the desktop.