turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Are these apps being downloaded from the Play store or from other sources?
The reason I ask is that as far as I am aware, most of the problems start when people download apps from outside of the Play Store.
To prevent apps that are not from the Play Store installing I would recommend selecting Settings then Applications then checking to make sure that Unknown Sources is un-ticked. This will reduce the risk of installing dodgy apps on your device.
