Windows Wiki

User Account Control

User Account Control (UAC) is a technology and security infrastructure introduced with Microsoft's Windows Vista operating system. It aims to improve the security of Windows by limiting applications to standard user privileges until an administrator authorizes an increase in privilege level. In this way, only applications that the user trusts receive higher privileges, and malware is kept from receiving the privileges necessary to wreak havoc on the operating system.

In other words, with UAC a user may have administrator privileges, but an application that that user runs does not unless it is approved beforehand or the user explicitly authorizes it to have higher privileges.

UAC will usually prompt the user for additional privileges automatically, but the user can also right-click a program and click "Run as administrator".

Did you know:

• The Xbox 360 has sold more than 17.7 million units.
• Microsoft's first international office was founded in Japan on November 1, 1978.
• The name Microsoft is a portmanteau of "microcomputer" and "software".

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• Check List of Microsoft Windows components for a long list of articles that need creating.
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