Emsisoft Anti-Malware
Free malware scanner to clean and protect your PC from viruses, spyware, trojans, bots, adware and worms. It uses 2 major scan engines to find more than 4 million different types of malicious software. Including file guard and surf protection

Security Task Manager
provides detailed information about programs and processes running on the computer. For each process it shows the name, file path, process description, security risk rating, start time, icon, hidden functions (keylogging, browser surveillance)