Microsoft's Windows operating system allows users to create User Accounts that tells Windows which files, folders and programs the person the PC can access, as well as retaining personal preferences such as the particular theme that's being used. You can have more than one account per PC, so here's how to create a new User Account in Windows 7.
From the Start menu, open the Control Panel.
Select User Accounts and then choose Give other users access to this computer if your machine is on a domain, or Manage another account if its on a home network where no other PC has control over it or is a stand alone PC.
If you're on a domain, you'll be presented with a list of existing accounts for the PC. Press Add. You'll be asked to enter a User Name and the domain name. Now select whether you want to grant the user a Standard account or an Administrator account. Then press Finish.
Alternatively, if your machine is a stand-alone PC or on a home network, you'll simply need to enter a name for the user and select whether they will be a Standard or Administrator account. Then press Create Account.
While user account's don't need a password, Microsoft recommends you set one. The user can do this themselves, by logging on to the PC and opening the Control Panel. Select User Accounts and then choose Create a password for your account. Enter the password and then type it a second time to confirm it. You can also add a password hint if required. Then press Create Password.
If the PC is on a domain, the password can only be created by the administrator. Open the Control Panel and Select User Accounts and then choose Manage another account. Select the account you want to create a password for and press Create a password. Type in the password, confirm it and then press Create password.