Lavasoft has released Ad-Aware 2008, the latest version of the company's popular anti-spyware utility for Windows.
The Free version what is new
1. Improved Threat Detection
2. Spyware, Adware, Trojans & Hijackers
3. Fraud Tools & Rogue Applications
4. Password Stealers & Keyloggers
5. Enhanced Rootkit removal system
6. Faster Updates & Faster Scans
7. Less Resource Usage for optimal computer performance
8. Easy to Download, Install and Use
9. Lavasoft ThreatWork submission tool
10. Compatible with Windows Vista (32- and 64-bit)
Ad-Aware 2008 comes in Free, Plus, and Pro varieties. The free version lacks real-time spyware detection, scheduled scans, tech support, and anti-virus software. But it still does a pretty good job of finding spyware on your system.
You can find a comparison chart here and download from that page itself.