Lenovo notebooks can achieve default login through the following settings instead of modifying the registry.
1. Enter "netplwiz" in the start menu search box and press Enter to open the Advanced User Control Panel.
2. In the Advanced User Control Panel, uncheck the item "To use this machine, users need to enter a username and password (E)".
3. The system will pop up a window asking for the default username and password to log in to the system. Click OK after completing the input.
Restart Windows Vista and you will find that the system automatically logs in as the default user.
