Which anti-virus software you use,do you trust the free version?

I try a lot freeware antivirus, the first one was AVG it detect some viruses but sometime it slow my pc, so try avast it seems to have better performance that AVG but is little complicate to use, and finally i try AVIRA and for now i like it.

Currently, I am using the free version of avast. As far as I know, different antivirus programs protect the computer from different types of viruses. I prefer avast over avira and antivir since I noticed that viruses not detected by avira/antivir can be detected by avast. I asked computer technicians about the best antivirus but they couldnt name one. I would really want to get the full version of the antivirus but it is quite expensive and as of the moment it is not included in my budget. So i think I have to live with the free version. I am still in the search for a better free antivirus. Avast is not that good too maybe because the one I'm using is a free version. Last November, my computer got attacked by a strong virus (I forgot the name though) and I had to wait for a month to have it worked again. The virus was making the computer restart again and again and it didn't allow me to re-install my printer. Hopefully it won't happen again because in our world right now, computer and internet are two very important things.

Hmmm, I am not sure which one I have on my laptop, whatever brand I have is what came with my laptop when I bought it. I pretty much don't trust any of them...as someone who is going to get into your pc, they will find a way. Those geeks are pretty smart...that's why they are geeks!

I assemble and troubleshoot PCs as a hobby. I personally always use and recommend free antiviruses from reputed brands e.g. AVG, Avira etc. I have never had any problems with free antivirus software. It does the work just fine. Currently I am using AVG Free Edition 2011 and it just keeps getting better with each update.

Those free version are good (in my opinion), but don't forget to update. I am using AVG free and it works good. Then I'm also using the local antivirus Smadav, for free too. A friend once told me that, I should use 2 antivirus, one is for fighting the international viruses and the other for the local ones. So far I've survived the cyber world.