I have an Acer Aspire 5517 that the microphone does not work with Skype and probably other programs, I have tried to use an external microphone which worked for a time but no longer. I need to communicate online. Thank You
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so whats your actual question?
how to fix the mike or how to restore the pc?
you could try to use the a windows system restore point and see if the microphone works again. you have to provide a little more information.