I have Norton 360 tablet version on it. I don't think it is necessary, however, for the simple fact that I don't download or play any games. All of my entertainment is through MicroSD Card with 32G capacity (Samsung will not recognize any external storage larger than 32G). I kind of like the use of DROPBOX except it is little too intrusive to your information in your system. All in all, I don't think it is a necessity to have virus protection on it.