I am using Selenium web drivers, and today, for no apparant reason I started getting an error with the message\"Chrome Automation Extension has crashed. Click this balloon
I had the same problem. In my case it was related to the Windows account I use to log in to Windows, which is account in the Administrators group. However, it was not desirable to change the account type.
To solve this I created a new local account under the control panel (of type 'power user') and used that account to run Chrome and it worked fine.