From my perspective, I have a professional antivirus program that I have after long search discovered by accident.
Following:
The Free-virus programs, including Windows Defender, AntiVir and Co .... have to do with protection bit. They are just for free! At first glance! But costs at the end of a nerve and time!
They are too slow and keep Internet traffic was not. This means they can be one or the other virus by unnoticed. The user is not noticed and weighs in safety. Clearly the the free program is then super!
Just think for users, you would for labor in vain? Believe me, the program developers do not do it! Stay away from the free virus programs are useless really.
In fact, I have misled me and tried the so-called winner. None of the test winner could convince me. Look like to the reports the user a closer look at and make up your own mind! Advertising and money making it up!
Tests quiet times the NOD32 from ESET. You can download on the website directly from ESET and 30 days testing.
Have I made and then bought on Amazon.
The best experiences are the ones you make yourself.
Addendum, since July 2013 in use and since installing virus free! No error message - perfect program !!
Addendum 14/12/2014 currently running! No problems, no viruses! I'm still excited!