Knowing your Windows user name allows you to navigate to various user folders. Here is how you can quickly get your Windows user name:
Option 1: Normally, if your computer logs you in automatically (e.g., on a home network), go into the control panel (on Windows XP/2000/Me - press Start -> Settings -> Control Panel -> User Accounts; on Windows Vista / Windows 7 - press the Windows icon, choose Control Panel, and select User Accounts). You will see a list of user accounts. Usually you will have just one active user account (it is a coloured icon). Note the name next to the icon.
Option 2: If you see a log-in screen on computer start-up, note your user name from this screen.
Option 3: On a corporate network, your user name is the name you type on the Windows log-in screen above the password.