How to Change the Default Startup Tab in Task Manager in Windows 10 Version 1903?
Step 1: Click on the 'Search box' in the Taskbar.
Step 2: Type 'Task Manager', and then click on it to open it.
Step 3: Click on 'Options'.
Step 4: Hover your Mouse on 'Set Default Tab', and then click on the Tab that you want as the default startup tab.
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https://www.youtube.com/watch?v=eoQUOzsg_80