In this tutorial, you will learn how to start task manager from cmd prompt
Deploying Task Manager from Command Prompt works best if your explorer has stopped working.
Click Windows key+X or right click on Start and choose Command Prompt (Admin).

If your Windows 10 Start menu is still set to the default PowerShell option, you can open an Administrative Command Prompt by typing CMD in search and selecting Run as administrator.

Type taskmgr into the command line to open task manager in CMD.

Alternate ways to open Task Manager
Click Windows key+R for run, taskmgr > OK
Use the keyboard shortcut CTRL+SHIFT+ESC
Right click taskbar and select Task Manager.
Conclusion
By now you should know how to start task manager from CMD also known as command prompt, as well as easy alternatives.