Vijay Kumbhani.

How do I remove an account? On Start, tap or click  Mail. Swipe in from the right edge of the screen, and then tap  Settings . (If you're using a mouse, point to the upper-right corner of the screen, move the mouse pointer down, and then click  Settings .) Tap or click  Accounts . Tap or click the account you want to remove. At the bottom, tap or click  Remove account  or  Remove all accounts . This removes the account from Mail, but doesn’t delete the original account or messages. You’ll still be able to get to them through a browser or other mail app. If you remove the account you used to set up Mail, that removes all of your accounts from Mail, Calendar, People, and Messaging. Removing your  Microsoft  account (the account you use to sign in to  Windows ) is a different process. That account is required to use Mail, and removing it will remove all of your accounts from Mail, Calendar, Messaging, and People....

First, please swipe up from the bottom of the screen when using Modern UI (If you're using a mouse, please right-click the mouse), then click " All apps ". Then click " Run ".  Next, please enter  shell:startup , and click " OK " after you are done. The long lost " Startup " folder appears. Now, you may put all the shortcuts of the programs you want automatically started into the folder.