My webcam isn't working anymore?

Before this happened, I used to be able to go on omegle with my friends just for a laugh, I know, it sounds weird, haha. It used to come up with a box that said allow or ignore about the webcam being used. It doesn't come up with that anymore so it doesn't show what my camera sees. I can't go on my webcam worker because it isn't officially mine. I have it from the school and until three years, it's all mine. For everything I want to download or anything else, it has to be password protected and only the school know the username and password. I need help urgently. It works on everything else, like google hangouts and a photo app. I've tried to go on it on google chrome and explorer. PLEASE HELP!!!
Asked Jan 04, 2014

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