Automatic logon in windows XP/7/8/Windows Server

1. Open the Windows Registery editor from run.exe [ type regedit and ENTER ]
2. Navigate to "HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\winlogon"
3. Set or create the following keys (DWORD, String, String)
• AutoAdminLogon = "1"
• DefaultUserName = Your user name
• DefaultPassword = Your password
4. Restart and now machine will be automatically logged in :)