Malwarebytes anti-malware scanner
Malwarebytes is a free anti-malware program that will detect and remove malware including worms, trojans, rootkits, rogues, dialers, spyware and more.
Malwarebytes sweeps away malware infections but does not include realtime protection.
Features: Advanced Malware Detection and Removal * Eradicate Existing Malware Infections * Malware Database and Heuristics Updates * Access to Online Community (Email/Forums) * Multi-Language Support
A commercial (premium) version is also available.