Right-click on the Taskbar and select Task Manager. 2. Click on the Process tab. 3. Now sort the process with the highest network usage. So, click on the Network column. 4. If the Windows Update is downloading you will see a “Services: Host Network Service” process. 5. Expand the process, and you should see the Delivery Optimization process. 6. The Delivery Optimization process is related to the Windows Update and only activates if the Windows is downloading or installing the updates. 7. You can stop the process by selecting Delivery Optimization and clicking on End Task.