Knowing my laptop
just need to know how to turn on my camera laptop
Hello and welcome to Tom's Hardware Forums. You posted this same question three times so you might get some more replies in the other threads.
A laptop's webcam should always be on by default. When you open My Computer (just Computer in Vista or Windows 7) you should see the camera in the list. Double click it and the image it sees is shown on your screen.
If it doesn't show up, please post the model of your Acer.