Resetting default audio settings in windows 7 (TESTED) [SOLVED]

By this tutorial you will learn how to reset sound settings in windows 7...
This article contains such steps that will 100% works for windows 7
you just need to keep compatible audio driver with you..

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Step 1 : Right click on My Computer

              then click on Properties

 

Step 2 : Click on Device Manager at the left hand side

Step 3 :  Find Realtek High Definition Audio in the given list

 

Step 4 : Right click on Realtek High Definition Audio
              Then click on Uninstall and then Click Ok.

Step 5 : Once driver has been uninstalled then click on Action

              and then click on Scan for hardware changes

Step 6 : Just wait for a few seconds. Your Audio drivers should be installed again and your sound setting will be reset.