In past years, Microsoft has brought up the rear in many antivirus tests, sometimes earning a below-zero score. AAA certification from Dennis Labs suggests that Microsoft's antivirus is coming out ...

It covers a single Windows computer and can be found online for $20. Trend Micro Internet Security extends the coverage to three Windows computers for $80 although is often as cheap as $40.

Three licenses for Bitdefender Internet Security, ESET, or Trend Micro Internet Security run a bit less, just under $80. A $96.99 yearly payment gets you five Avira licenses. That’s the highest ...