Spybot - Search & Destroy is a free security and privacy application designed to detect and remove malware, such as spyware, adware, Trojans, keyloggers, and other malicious software from your computer. It also includes an immunization feature that prevents malicious software from being installed in the first place. It also includes a real-time protection feature that scans and blocks malicious software as it is being installed or running on your computer. Spybot - Search & Destroy also includes a Live Protection feature which monitors your computer for suspicious activity and can report back to the development team if any malicious software is detected. This application is useful for users who want to protect their online privacy and security.
Very efficient and updated several times a day. Use the free version, update manually and get the best price after the update. This is my main anti-malware software.