I am trying to get Protractor up and running following the official Getting Started Guide.
The command
webdriver-manager start
seem
Delete that un-completed zip file(chromedriver_x.xx.zip), and you need it execute the update again. The folder will look like this:
chromedriver chromedriver_2.10.zip selenium-server-standalone-2.43.1.jar
chromedriver
chromedriver_2.10.zip
selenium-server-standalone-2.43.1.jar
and everything goes well.