Realtek hd audio uninstalled

Hello,
my name is arun. yesterday me being stupid and unexperienced uninstalled my sound devive realtek hd and like you danny . i just dont know what iam going to do . as i dont know what to do with the downloa that whole rocess with that way of solving that problem seem to be confusing and know for some reason i cant even listen or hear anything on my laptop i am really feeling stupid and need some help please i just need some with this.ASAP.
thanks guys.