That's why there are more and more security programs available to protect your system from viruses, trojans, and other malware.
Comodo Internet Security is a free pack of security applications for Windows that will help you keep your system protected from all kinds of malicious software.
Comodo Internet Security has two fundamental tools: Comodo Antivirus, a complete antivirus, and Comodo Firewall, an effective firewall. Both are completely configurable from the program's configuration module.
Comodo Internet Security comes with two additional modules. The first is called Defense, and is specialized to protect files, passwords, and processes, so that those aren't affected by any potentially dangerous applications. The second is the configuration module itself, from which you can select how frequently the program updates its virus database and performs diagnostics on your connection, as well as modifying other options related to the look and function of the security suite.