Other signs include unexpected messages that pop up on your PC, programs that start automatically, or the sound of your hard disk constantly working. (thewindowsclub.com)
Two interesting, even unexpected messages emerged from BAFICI's competition sections. (filmcomment.com)
Using the proximity sensor if it detects what the developer calls a «close event» a popup will appear on the screen to prevent you from making inadvertent calls or sending unexpected messages. (crackberry.com)