C:\WINDOWS\system32>node -v
v12.9.1

C:\WINDOWS\system32>cnpm install -g appium

C:\WINDOWS\system32>appium-doctor


C:\WINDOWS\system32>appium-doctor
Running Android Checks
✔ ANDROID_HOME is set to "D:\Program Files\android\android-sdk-windows"
✔ JAVA_HOME is set to "D:\Program Files\Java\jdk1.8.0_31."
✔ ADB exists at D:\Program Files\android\android-sdk-windows\platform-tools\adb.exe
✔ Android exists at D:\Program Files\android\android-sdk-windows\tools\android.bat
✔ Emulator exists at D:\Program Files\android\android-sdk-windows\tools\emulator.exe
✔ Android Checks were successful.

✔ All Checks were successful