Pros:  i) easy to install and use. ii) it works.

Cons:  i) The dire warning about leaving your computer unbootable may put you off ii) you can no longer get free updates

Other Thoughts:  I've had this software for some time now. I had a rootkit which Spybot detected but could not remove (even though it claimed to have done). On running the AVG software, it came up with dozens of suspect files but the warning that removing them may cause dire problems prevented me from doing it for months. I finally got the courage to remove them and, luckily, everything was fine; my computer now runs twice as fast as it used to and doesn't crash every day!

Unfortunately, Grisoft do not provide free updates on this programme - although it is apparently part of their professional suite.