How to install Android ADB drivers on Windows? (Any Android Phone)
There are many tutorials on the internet, and I will explain the best method here in my answer. 


Download this program: http://www.mediafire.com/download/gy3g3gdc1vzcv6a/adb-setup-1.4.2.exe
Open the program.
Select Y on every option.
ADB should now be successfully installed on your Windows 8.x computer.


More information can be found here.