Please be aware that Sophos no longer offer a home use anti-virus client under the universities licensing scheme.
Instead you can go directly to Sophos and download their commodity home client for Windows or Mac.
Microsoft provide free anti-virus applications for home use.
Security Essentials for Windows 7 or earlier Security Defender for Windows 8 Security Defender for Windows 10Alternatively you can choose from a range of other anti-virus providers, many of whom have free home editions.