You can create a user account for guests, people who will only use the computer on a brief, temporary basis. The guest user will be able to use the programs on your computer, but they won't be able to access your files, mess with your settings or install apps.
To create a guest user account:
Click
Click
Enter guest as the Name and Username, then click
When the Change User Password window appears, enter a password, then check
You will be returned to the Users Settings window. Make sure that
If it isn't, click the
You can change what the guest user is allowed access to on the computer. Click
When you've finished, close the Users Settings and try logging in to the guest user account.