Ad-Aware Anniversary Edition 8.0
Free; paid upgrade available
Windows 2000/XP/2003 Server/Vista(32- and 64-bit)
No limitations.
Publisher's description of Ad-Aware Anniversary Edition
With behavior-based threat detection and integrated real-time monitoring, Ad-Aware Anniversary Edition focuses on core consumer security needs. Instead of adding layers of bells and whistles--thereby slowing your computer and scans down--we have decided to focus on what really matters. Anniversary Edition provides advanced threat protection, and is significantly lighter and faster than our previous versions.
Numerous changes in Ad-Aware Anniversary Edition include: Behavior-based heuristical detection; Ad-Watch Live! integrated real-time protection; Customizable Profile Scans and full integration with Windows Security Center.