This is among the first settings that it is best to change or examine in your pc. 

Whenever you first arrange a brand new PC with Home windows 10, you create a consumer account. By default, your new account is ready to log in routinely at startup. When you’re at residence on a regular basis or don’t have entry to any delicate knowledge, then this may not be an issue. However it will probably create a critical safety threat if anybody can open your pc, then instantly get entry to your knowledge and firm methods. That is particularly necessary when you journey with a laptop computer, bringing it with you to locations like a espresso store, airport, or open co-working areas. 

Follow below steps to disable auto login to your Windows 10 pc:

1. Press Win+R to open the Windows Run Box:
2. Enter “netplwiz“ into the Windows Run box and click OK. This will open the “User Accounts” window.
   Netplwiz is a Windows utility tool for managing user accounts.
3. Check the option for “Users must enter a username and password to use this computer” and click Apply.
4. That’s it. Restart your computer and the system will prompt you to enter your password at the login screen.