My suggestion, for both Mac
and Windows users, boils down to three things:
- Use backup software. On Macs that's very easy ... Time Machine. You can buy a big external hard-drive at an office supply store, or even at Wal-Mart. Do that. Plug it in. Macs know how to do the rest. (Windows makes it a bit harder.)
- Use only a limited, i.e. non-administrator account, even on your Mac, for all purposes other than updating the system software itself.
- Use actual passwords that are not trivial to guess, and do not "log on automatically."
Malware is always an
opportunist. Like the cat-burglar who walked from door to door in swanky neighborhoods with a pizza-box in his hand, ringing the doorbell and, if nobody answered, trying the front door. On a useful number of occasions, no one was home
and there were easy pickin's in or near the front room of the house. Even the simplest "locked doors," and the slightest bit of skepticism on your part, will cause malware to ignore your system completely.
Notice also that I use the word, "malware," not "virus." The latter word is chosen by marketing departments, because it implies a biological thing that you really can't defend against.
Windows users have a substantial problem with this ... simply because, on countless systems, Windows' quite-formidable security features are
turned off! (And, not easily turned on!)