Windows 7 User Accounts control which files and programs users can access and what types of changes users can make to a shared computer. Typically, you’ll want to create standard accounts for most computer users using these steps:

1. Click the Start button
2. Click Control Panel, then click User Accounts and Family Safety
3. Click User Accounts
4. Click Manage another account (If you’re prompted for an administrator password or confirmation, type the password or provide confirmation.)
5. Click Create a new account
6. Type the name you want to give the user account, click an account type, and then click Create Account

More information on User Accounts is available in the Windows 7 Help and How-To center.