Android Studio - No Target Device Found

I'm having trouble getting an Android app that I developed working on my phone. (Android Studio on Windows 7 trying to run the app on Samsung Note 3 running Android 5.0)

Here's what I've done so far:

• Turned on USB debugging and allowed unknown sources
• Installed Google USB Driver
• Restarted computer
• Tried updating the driver for the phone but no updates were available
• Turned on debugging in the build.gradle file

and yet it is still returning Error running app: No target device found

I have also tried the dialog option for when I run the app but that says No USB devices or running emulators detected

Is there anything I have missed?

Thanks in advance!

I ended up downloading the official Samsung ADB from here: http://developer.samsung.com/technical-doc/view.do?v=T000000117

And it worked great after that. Thanks everyone!