Free utility that detects and removes adware, hijackers, toolbars, and PUPs from your browser.
Powerful adware and malware remover for Windows.

Protect your computer from possible threats from USB devices.
Free and portable utility aimed at the detection and removal of specific malwares.
Powerful antivirus developed by Kaspersky, free.
A tool that decrypts files affected by various ransomwares.