Anti-Virus Software

I have rebuilt 5 computers in the past 3 months. One of those i have rebuilt twice in the last year! Why? trying to use all my spare computer parts. I found old hard drives (two 80GB) and put them in an old Athlon 64 with 1.5 gb of RAM. worked fine! I was trying to update all of Windows XP and add Office 20007 when bam it hit me! A VIRUS!!! I had not put on a virus protector because I wanted to get all of windows updates before slowing down the computer for the VPA (virus protection Application). Ok, yes I know you need protection but I thought I could - doge it! Scanned computer found virus yeah! I even inquired on the instructions to remove it. Writer was cute in saying repeat and when virus doesn't show up have a cup of coffee and sit back and enjoy. Evidently, the writer doesn't know me because the coffee came first and the virus - well it never went away! So what did I do? I took it part built another computer put a copy of Win 7 on it transferred the data and now trying to put the pieces back. Now that I finally have my new network working in the house, I will put on the virus program. Oh but wait which one? You know me I will not spend the money for a program unless I have to!

Look at this article http://download.cnet.com/Avast-Free-Antivirus/3000-2239_4-10019223.html?tag=mncol and see what you think. I have used Avast in the past on other machines. It has done well for me. I hope you will try it also.