Security vendor Sophos offers a free commercial-grade security solution (Sophos Home) for home users.
Protecting several Windows systems and Macs within a household, can be a challenging and expensive task. Security firm Sophos has developed security suites for business customers. Now, the technology developed for this enterprise level security solutions is available for private customers.
The product, named Sophos Home, protects every Mac and PC (up to 10 systems) in your home from malicious software, inappropriate websites and viruses. It uses the same award-winning technology that IT professionals trust to protect their business systems. And you can manage security settings for all your systems from any browser. Please note that this free version of Sophos Home is for private and non-commercial use, letting you protect up to ten computers per account.