AVG Free and avast! are usually at the top of the lists of free computer security tools, although they both have moderately priced full versions that are worth the expense.
Spybot – Search and Destroy’s free version is completely awesome and unobtrusive and can run side-by‐side with your regular antivirus software. Spybot’s main function is to find and get rid of sneaky programs that often install themselves when you click advertisements or install free software with annoying or dangerous add‐ons.
The newest Mac operating systems have some pretty hefty controls when it comes to downloads, meaning nothing can be installed without permission (or that’s the way it’s supposed to work). Just in case, I use iAntivirus, a free app from Norton, to scan my MacBook Air.
AVG Free, Spybot and iAntivirus all made Beth’s Top Security list!