If you are reading this article, then you are probably in need of one or really do not know why you should get one. To tell you why you need one, we should first see what an anti-virus software is and does.All the anti-virus software consist of computer programs that attempt to find, identify, quarantine and/or eliminate computer viruses and other malicious software. Both the computer viruses and the malicious software (malware) can harm your computer. They are mainly programmed to damage your programs or deleting key files or even formating your hard drive, therefore erasing everything on it. Some of them (the malware) simply replicate themselves until they fill up your computer’s memory.Considering what you have read, you can see why it is important to get an anti-virus. You do not want to lose your files or not being able to access them.Now should you buy one or get a free one? On the top of the market you can find the Norton Anti-virus and McAfee. They both cast a small shadow on the other anti-viruses, but in my oppinion it is only mainly because of their advertisements. Under the hood, all anti-viruses are the same. Remember that is important to keep updating your anti-virus (usually updates automatically by default). The problem is that with paid software, once you get it you cannot update it forever for free. That is my problem. Why should I pay Norton or McAfee when I can get free a anti-virus software that updates itself at no cost?Therefore in my oppinion, don’t rush to buy one yet because there are quite a few free anti-virus programs out there. To name a few:AVG, Avira Antivir and Avast. A google search will find these free software right away.If these are not to your liking or do not support your platform, keep searching…there is at least one for every need. So why buy an anti-virus software?