Press Window Key + R and then type in cmd to open the command line
Extract the file and go to the directory where you extracted the file
In the windows command line, type cd example/android-sdk-windows/platform-tools
Replace "example" with the directory where you extracted the file, such as C:/Users/Username/Downloads
On your phone enable developer settings
Click About phone. Tap Build number until it says that you have enabled developer settings. Now go back to settings and click Developer options. Look for USB debugging or Android debugging and enable it.
Plug your phone into your computer with your usb cable
On the windows command line type adb devices
The command line should show you your phone's serial number