Das ist sehr gut in folgendem Artikel beschrieben: http://pcsupport.about.com/od/windows-8/fl/auto-logon-windows-8.htm
- Open Run from the Apps screen, using WIN+R, or via the Power User Menu, and then type the following command in the text box:
netplwiz
Tip: You can also open Command Prompt and do the same if you’d rather, but using Runis probably a bit quicker overall.
- Tap or click on the OK button. The Advanced User Accounts program will open.
Note: Technically, this program is called the Advanced User Accounts Control Panel, but it’s not really a Control Panel applet and you won’t find it in the Control Panel in Windows 8. To make it more confusing, the title of the windows says just User Accounts. - On the Users tab, which should be where you’re at now, uncheck the box next to Users must enter a user name and password to use this computer.
- Tap or click the OK button at the bottom of the window.
- When the Automatically sign in box appears, enter the user name you wish to automatically login to Windows 8 with.
Important: If you’re using a Microsoft account, be sure to enter the entire email address that you use to sign in to Windows 8 with in the User name field. What defaults there might instead be the name associated with your account, not your actual user name. - In the Password and Confirm Password fields, enter the password you sign in to Windows 8 with.
- Tap or click the OK button.
The Automatically sign in window, as well as the User Accounts window, will now close. - Restart your computer and make sure that Windows 8 automatically logs you in. You may catch a glimpse of the Sign in screen, but only long enough to see it log you in without you having to type anything!