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I Need Realtek HD Driver For Dell Inspiron N5010

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Go to Dell Support and check under Drivers & Support then give them your computer's service tag. You'll be provided with a list of drivers and applications for your computer, from which you can download and install whatever you want. You may need to change Dell's region settings if you're not from the USA.

http://support.dell.com/support/downloads/

One piece of advice. Save whatever you download, and then you'll have it for the future should you need it again, without having to download it again.

thanks for providing link..it's helped me a lot!

You can also get the same driver right from Realtek, if you care about getting the most recent, updated one.