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Try Reinstalling Original Driver & check again.
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Power on your laptop try using F8 and log in using safe mode and restart and boot using normal mode.
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Open your Realtek HD Audio Manager, on right side double click on your port icon and select Mic In then OK.
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Try this:
http://www3.sagernotebook.com/drivers/video/9370/nvidia%20video%20driver%20for%20windows%208.zip
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Disable your secure boot and change uefi to csm boot.