AppLocker vs. Application Control: What Is the Difference?

The first part of this series made it clear: the most effective method against modern cyberattacks is the explicit approval of software (whitelisting). However, when implementing this in Windows environments, administrators quickly encounter two core terms from Microsoft: AppLocker and Application Control (WDAC / App Control for Business).

Application Control (WDAC): The Kernel Successor for the System

WDAC anchors rules deep within the Windows kernel—completely independent of the logged-in user.

• Focus: Protection at the system and kernel level.
• The Strength: Maximum protection against malicious code that stops at nothing, even local administrators.
• The Practical Downside: WDAC does not differentiate between users and is extremely rigid. Because configuration is so complex, IT departments tend to loosen rules or disable WDAC entirely when problems arise. As a result, the security advantage in everyday operations is often lost.

AppLocker: The Irreplaceable Specialist for Users and Everyday Operations

AppLocker is by no means obsolete or deprecated. Microsoft continues to actively support and maintain AppLocker—for good reason:

• Focus: User- and group-based rights management.
• What WDAC Cannot Do: Only AppLocker allows you to control which specific person is permitted to launch an application. WDAC only regulates whether a file is allowed to run on the machine at all.
• The Practical Advantage: During ongoing operations, a rule can be adjusted in seconds, switched from block to allow, or temporarily paused for administrative tasks.

Do these two technologies really cancel each other out? In the next part, we will look at why combining both systems creates the ideal security strategy.