Windows 7 Credential Manager stores logon user names and passwords for network resources such as network shares, web sites and terminal services, and allows you to back up, restore and manage saved credentials. Credential Manager stores these details in the Windows vault. In addition you can back up the Windows vault on one computer and restore it to another computer. When you opt to save your credentials by checking the Remember my credentials checkbox in Windows Explorer, Remote Desktop Connection or in Internet Explorer, the Credential Manager kicks in and stores these entries in the Windows vault.
Some installations of Windows 7 are set to allow the default user to log in automatically when the computer starts. However, requesting users to enter their login credentials when the computer starts is highly recommended as it is a security measure. Conversely, when the computer is located in physically secure location, automatic logon might be preferred. Remember, that anyone with physical access to the computer can start the system and access your data if user login is set to auto!