I stopped using Ad-Aware a while BACK but it is still one of the most reliable adware removal tools there is. Looks like they are working on a new release.

This is Beta software so it is to be used with caution at your own risk.

Ad-Aware 2008 BETA Win XP/Vista
Quote

Redesigned Engine – Benefit from superior PROGRAM flexibility and more accurate scanning methods with all-new program architecture.

Improved Code Sequence Identification (CSI) Technology – Boost your privacy protection with precise detection of embedded malware, including known and emerging threats.
Incremental Definition File Updates – Save PRECIOUS time and resources with smaller update files resulting in faster download times.

TrackSweep - Control privacy by erasing tracks left behind while surfing the Web on Internet Explorer, Firefox, and Opera, with one easy click.

Multiple Browser Support – Choose Internet Explorer, Firefox, or Opera with expanded browser support.
New Straightforward USER Interface – Effortlessly maneuver the complexities of malware detection and removal with our new user-friendly interface.

User-Controlled Spyware Removal - DECIDE for yourself what to delete from your system and what to keep.
Extensive Detection Database – Stay protected with regular updates from the extensive library of identified and analyzed spyware.

System Restore Point – Easily revert back to your clean system to recover from a spyware attack.

Limitations: Scan and remove only, must purchase for on live protection.

Requires this Instalation key: 6DB04-PR6TJ-LN6N7-SGL2L-2N337 for the beta test

If you would like to sign up directly for the Beta program Go Here