There are viruses for both. Keep your computer behind a NAT firewall, don't open dodgy looking emails, pirate software, or go on dodgy websites and you can be f

There are viruses for both. Keep your computer behind a NAT firewall, don't open dodgy looking emails, pirate software, or go on dodgy websites and you can be fairly confident. The best security model on a common operating system is probably Android, especially the newer security enhanced versions. Keep your work, banking, and home stuff separate? Check. Fine grained control of what apps can do? Check. Prevent programs from interfering with other programs or the OS? Check. The 3 problems for android are - we don't know much about most software publishers (why should we trust them), lack of opensource apps for important stuff, and users are used to giving apps permissions they don't need.