A-Squared Free is a free internet security software by Emsi Software to protect you from the newest threats. A-Squared Free scans your hard drive for infections of Trojans,Viruses,  Backdoors, Spyware, Adware, Worms, Keyloggers, Bots and Dialers, removes all infections and restores your PC to maximum performance.  It is a combination of two world class products – the A-Squared Anti-Spyware, and the Ikarus Anti-Virus engine. Latest tests approve that both are cutting edge in malware detection.

You can download A-Squared Free from here. It is designed to run parallel with other antivirus and firewall software without troubles.