Acer Webcam

Hello,



Hello , i have had my acer camera for about a year and a half . Because i have a stubborn and dumb brother , i have had reset my computer to its default settings about 5 times . I don't know why , but after the first time i reset it , my installed acer webcam hasnt been working. When i install the webcam , and start it , it says CAmera no found !! . I have an acer mini netbook aspire one A0751h . Please help me !! P.S. In there is nothing named imaging devices by the device manager.