IObit Malware Fighter (the successor of IObit Security 360) is a software which can help to protect your computer against spywares, trojans and other malware . It automatically detects and removes threats on your PC before they infect your machine. This software is completely free, and is compatible with Windows Vista, 2000, XP and 2003.
How to choose the right anti-spyware software?
Installing SpywareBlaster will immunize your browsers (Firefox, Opera, Internet Explorer) without slowing down your PC.
For beginners: The Avast antivirus, Firewall or ZoneAlarm windows.
For experienced users: Avast, Malwarebytes and Comodo firewall.
For paranoid users: Avast, Malwarebytes or SuperAntiSpyware, Comodo firewall and anti-spyware performing a real-time analysis (Spybot, Spyware Terminator, Windows Defender or Spyware Guard).