adb cannot find my device for Android debugging. Why?

Question

1. I installed Windows USB Android SDK driver for the Android Dev Phone 1
2. I enabled all the debugging modes and stuff on the phone.
3. It even says...USB d

Answer 1

Might be faster just to restart the adb server:

adb kill-server ; adb start-server

Or what I often use:

adb kill-server ; adb devices

When you call adb devices it automatically starts up the adb server. Then gives you the list of devices it can find. Sometimes even then it doesn't find the device right away so you may need to call adb devices a few more times.