Dell Inspiron 15 (1564, Early 2010) - Manual (Page 251)

Security and Privacy
251
Security and Privacy
Protecting Your Computer—Using Administrator
Rights, User Groups, and Passwords
The Microsoft
®
Windows
®
operating system has security features such as
administrator passwords and user passwords that let you control access to
your computer and the information stored on your computer.
Administrator Rights
An administrator can make system-wide changes to the computer, change
security settings, install software, and access all files on the computer. A
person with a computer administrator account has full access to other user
accounts on the computer.