Are you encountering the following errors with ADB?
Windows Command Prompt c:androidsdkplatform-tools>adb devices adb server is out of date. killing... ADB server didn't ACK * failed to start daemon * error: unknown host service
ADB server cannot start if port 5037 was occupied by other process hence we need to find and kill the process to release this port.
c:androidsdkplatform-tools>netstat -aon|findstr 5037 TCP 127.0.0.1:5037 0.0.0.0:0 LISTENING 6889 TCP 127.0.0.1:5037 127.0.0.1:50506 TIME_WAIT 0 TCP 127.0.0.1:5037 127.0.0.1:50507 TIME_WAIT 0
PID 6889 is occupying port 5037. Find the process and kill it.
2. Start ADB server
c:androidsdkplatform-tools>adb start-server * daemon not running. starting it now on port 5037 * * daemon started successfully *