I use android 4.3 and my device is root and I have AVG and adblock plus . but after Friday , when I connect to network with wireless , I see new icon in left corner at top of my phone , and I see new notification about new softwares like antivirus and cleaning application . sometimes I see two or three icon and I can not remove these advertise or notification , when I click one of them my browser open and my browser start download some apk files , but I do not install them . For examples I see notifications about how much email I have and I see one or two or three icon about application . Is my phone hacked or my system has virus or malware ,? How I can do let my browser do not download files bad files automitacally ? Which app can scan my phone and show my I have rootkit or bad app ?