Avast are one of the leading anti-virus companies, with over 400 million customers.
You can download their software for free, but you can also unlock more features and enhance your online security with premium plans.
With the paid plans you get all the usual protections against viruses, ransomware and malware, and a firewall. In addition, get protection against more sophisticated threats, an advanced firewall, guard against webcam spies, protect your sensitive data, plus more.