Following the instructions in the Arduino Engineering Kit Chapter 2
clear a
a=arduino
Updating server code on board MKR1000 (COM4). This may take a few minutes.
After 10 minutes I get
C:\Users\Bright\AppData\Local\Temp\ArduinoServer\MW\ArduinoServer.ino.map could not be removed.
C:\Users\Bright\AppData\Local\Temp\ArduinoServer\MW could not be removed.
Why can I not upload the Arduino server code to the board?