Top anti-virus softwares ... a must have

Well anti virus softwares are a must have especially if u download . I have tried many of them personally and i give these softwares the top three ranks. All these softwares have been personally tested by me and with unbiased ratings :RANK 1:NORTON ANTIVIRUS 2007:No prize for guessing this antivirus software is the best I have used , it has regular updates , cleans well and gives vista like