Mate here you go:http://developer.android.com/sdk/index.html
1.Download the zip.
2.Run SDK Manager
3.Download and install 1.Android SDK Tools
2.Android SDK Platform-Tools
3.Google USB Driver
4.Install PC Companion and connect your phone at least one time(if you havent done that) for geting the sony drivers.
I think you are done. I am not an expert so if they dont delete your post cause its in the wrong section. Somone will correct me if i have mistaken somewhere