Pupli

To use Registry Editor to turn on automatic logon, follow these steps:

1. Click Start, and then click Run.
2. In the Open box, type Regedt32.exe, and then press Enter.
3. Locate the following subkey in the registry:
   HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionWinlogon
4. Double-click the DefaultUserName entry, type your user name, and then click OK.
5. Double-click the DefaultPassword entry, type your password, and then click OK.Note If the DefaultPassword value does not exist, it must be added. To add the value, follow these steps:
   1. On the Edit menu, click New, and then point to String Value.
   2. Type DefaultPassword, and then press Enter.
   3. Double-click DefaultPassword.
   4. In the Edit String dialog, type your password and then click OK.

   Note If no DefaultPassword string is specified, Windows automatically changes the value of the AutoAdminLogon key from 1 (true) to 0 (false), disabling the AutoAdminLogon feature.

6. On the Edit menu, click New, and then point to String Value.
7. Type AutoAdminLogon, and then press Enter.
8. Double-click AutoAdminLogon.
9. In the Edit String dialog box, type 1 and then click OK.
10. Exit Registry Editor.
11. Click Start, click Shutdown, and then type a reason in the Comment text box.
12. Click OK to turn off your computer.
13. Restart your computer. You can now log on automatically.

Or another way for automatic login :

Press the Windows + R keyboard combination to bring up a run box, when it appears type netplwiz and hit enter…

Or use Autologon app :

https://learn.microsoft.com/en-us/sysinternals/downloads/autologon

References :

https://support.microsoft.com/en-us/kb/324737
http://www.howtogeek.com/112919/how-to-make-your-windows-8-computer-logon-automatically/

C:Users<username>AppDataRoamingMicrosoftWindowsStart MenuProgramsStartup

References :
http://blogs.msdn.com/b/jasone/archive/2012/08/19/windows-8-where-did-the-startup-folder-go.aspx