which antivirus do you use?

I don't anything about all of the anti viruses so I can't give you a good answer

I've been using kasperskys for years, It is convenient to use and doesn't drag down the speed of my computer. However, It is a little weak in protecting my computer from viruses which should be the main concern about an antivirus. I am thinking about getting another one. So please let me know if you have any good idea. ^_^

Now,lot of anti virus softwares are available in the market and there is a lot of confusion among user to use which one.Now i am using avast anti virus software.I am satisfied with its performance.I also tried Nod32 and this software is also a good one.