If you have a Mac or Linux operating system on your computer you still need to use anti-virus software because:
- while it is correct that most malware is targeted at Windows, this is not always the case
- even if your computer is not affected by malware, you might be unknowingly storing them
- if your computer carries viruses you risk infecting other computers (e.g. when you share files via USB)
- many infections of Mac and Linux systems could have been prevented by the use of anti-virus software.
Sophos anti-virus software will run on Windows, Mac, and Linux operating systems.