Still working 7 days a week in the trenches as a freelancer and still getting in machines with various AVs that are working or not and still infected. While AVG free remains the best because it finds more than any other and is also....well....FREE, even it doesnt find the lot because some viruses have been put out but not yet noticed by the AV community. Heuristics on any AV prog dont seem to make much impact.In recent testing, however, the one that consistently finds the most is Sophos but at its 3 computer licence minimum cost of approximately A$200 it isnt worth using if you can keep the computer AWAY from porn sites and illegal music and video download spots AND if you are smart enough not to fall for the email hoaxes etc. as AVG is good enough. The rest simply were NOT good enough.If you want, however, to be sure that your computer that has been on internet is virus free, you really need to know what to do after running an antivirus scan, to find things that may well still be there and remain hidden. In the end if you dont know how to do that, you need to find someone near you who DOES know how and I dont mean some jerk who "knows a lot" but someone who works in the industry and isnt a maverick. Ask the person you are thinking of spending money with to clear your computer of viruses "What is the first thing you will do?" if that person says the computer has to go back to base with them. If their answer isnt that they backup 100% of everything on your hard drive THEN go to work on it, you have found a jerk or a maverick. It isnt necessary to format and reinstall Windows to get rid of it (and in some cases it doesnt get rid of it with a simple format) if Windows is still working and in almost all cases it isnt necessary to take the computer away if you have broadband available to the worker. If there is no internet connection for whatever reason or the computer's windows isnt working then yes, I take it away and back it up then work on it. If I have a still working Windows and can get to internet, I am done in an hour on a reasonable machine but on an ancient machine it may take two hours.At the end of every time that I have deloused the machine but not taken it away, I recommend the installation of AVG free and running the scan for viruses from there because I do not know ONE person in the world who knows EVERY virus there is. If your computer person cant do that, then they dont know what they are doing, provided your computer is still capable of getting to internet.Once you have infected your machine and need someone to fix it, PLEASE dont accept ***** or excuses. If they cant do as above if your machine is still working and can get to internet, they arent up to the job. So, save your money and find someone else to pay.