ESET SMART SECURITY - QUICK START GUIDE FOR MICROSOFT WINDOWS VISTA-XP-2000-2003-2008 Quick Start Manual page 6

1.5. Detection of potentially unwanted applications
Since some potentially unwanted applications are used
legitimately, and might not necessarily pose a security risk,
the user's consent is required to enable detection. Select
this option if you want to block these types of applications.
Click Next to proceed to the next step.
1.6. Completing the installation
When all necessary parameters have been configured,
start the final installation by clicking the Install button.
The installation progress will be indicated by a progress
bar. After installation is complete, ESET Smart Security will
be started automatically. Since a computer restart is not
normally required, you can carry on working with ESET
Smart Security working in the background to protect your
computer from malware threat.