- Press Ctrl+Alt+Delete and click Task Manager.
- Go to the Processes tab.
- Click the Image Name column to alphabetize the list of running processes.
- Scroll down the list. If there are any processes called MSIEXEC.EXE, select them and click the End Process button.
- Close the Task Manager window and begin.
If you are not comfortable ending the process, reboot your computer and follow the steps above to see if there are any instances of MSIEXEC.EXE still running in the background since rebooting generally closes this process.