Hi Crimsom, Sorry for the late reply, I was having some issues with the dell website recently. So I try the older version before but it show me the same error as before. However I had solve my audio issue by updating the window. Thank you very much for your help.  
Hello, I had some audio driver issues about my Alienware 13, so I'm trying to download the old audio driver, so I uninstalled the latest Realtek audio driver on my laptop to swap to an older version of it. However, when I try to download back latest/older Realtek audio driver, it apper to be an error which shown in the image attached. Does anyone know how to solve this problem? Thank you.   [IMAGE]
15 R3, reinstall Audio driver