Go into the control panel, into the hardware section, and click on sound. You should get a popup like this

Find your microphone, right click, and select disable as it shows in the picture.
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I have an E-system Laptop and the built in microphone suddenly turned itself on yesterday and I havent been able to get it off.. I have tried all the tips and nothing is working. please help :(
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Go into the control panel, into the hardware section, and click on sound. You should get a popup like this

Find your microphone, right click, and select disable as it shows in the picture.
I tried this and it disapeared from the list. But it's still not shutting off.
Thanx dude it worked for me
Contact the manufacturer to see what you can do.