Free utility that detects and removes adware, hijackers, toolbars, and PUPs from your browser.

Specific antivirus for portable devices such as USB sticks.
Portable and free tool that allows diagnosing and resolving issues in Windows systems caused by malware or other failures.
Free tool focused on improving the security and performance of your computer.
Robust security tool, developed to identify and remove a large number of threats, including viruses, malware, trojans, spyware, and other potentially dangerous files.
Free and portable utility aimed at the detection and removal of specific malwares.