I received a call saying a Trojan worm is affecting my Mac. The call was from India. Is this a scam? Or can I find a way of checking my computer myself? On 4-12-14, I paid to have my firewall fixed which had let in some maleware. The firewall is on now.

Question

Today, 4-26-14 I received a call from India claiming my Mac was infected with a malware: a trojan worm and they were from Microsoft Support group. I did not believe them and ended the call. On 4-12-14 I paid a 3rd party vendor to fix my system connection for my wireless HP printer. The 3rd party found that I had not set up my Firewall correctly and had let in 31 malwares. It has been fixed, the Firewall is in place and all seems fine both on the Mac and with printer operations.
The question is, can I check to see that all is fine on my Mac easily so I can do my own assessment versus listening to a potential scam to sell me unnecessary computer software fixes?

Answer 1

It's a scam, ignore it. You don't have to worry about malware however your computer uses a pretty old version of OS X, if you can update the computer to run Mavericks 10.9.x I would strongly recommend that. This way your computer will remain even more safe as it will then be using a version of OS X that Apple continues to update and provide security updates for. The minimum system specifications for Mavericks are:
To install Mavericks, you need one of these Macs:
iMac (Mid-2007 or later)
MacBook (13-inch Aluminum, Late 2008), (13-inch, Early 2009 or later)
MacBook Pro (13-inch, Mid-2009 or later),
MacBook Pro (15-inch or 17-inch, Mid/Late 2007 or later)
MacBook Air (Late 2008 or later)
Mac mini (Early 2009 or later)
Mac Pro (Early 2008 or later)
Xserve (Early 2009)
Your Mac also needs:
OS X Mountain Lion, Lion, or Snow Leopard v10.6.8 already installed
2 GB or more of memory (4GB or more STRONGLY recommended)
8 GB or more of available space