A cousin of mine once asked me to find an app locker & having experience with CM app locker I thought of trying something new & norton instantly caught my attention.Usually apps from big/famous security companies(excl avast maybe) are without ads as ads may have a security risk/annoying effect & main purpose of these free apps is to advertise their paid AVs/security products on desktops/windows so good impression is very important.Dude this is great suggestion. I have been using this for more than a week now. There are no ads in this. The app is slightly slow sometimes, but it works great mostly. Damn I was using horrible security app until now.