To find out if it is running in Windows press [Ctrl Alt Del] on your keyboard to open the Windows Task Manager. According to Google GoogleCrashHandler.exe has the following characteristics:

GoogleCrashHandler.exe runs continuously on your computer if you’ve selected to send anonymous usage statistics and crash reports to Google for certain Google software, like Google Chrome. It helps send crash details to Google when your Google software unexpectedly shuts down. We use this data to help determine how to prevent these errors from happening in the future.

The process can be turned off in the installed Google programs. That could be a bit of a problem if several Google applications are installed on the computer system. In Google Chrome – Google’s web browser – you have to go to into the Options, switch to the Under The Hood tab and remove the checkmark in front of “Help make Google Chrome better by automatically sending usage statistics and crash reports to Google”.

Other Google applications have similar options. If more than one Google app is installed you need to go through all of them to turn off the crash reporting in all of them. Once that is done GoogleCrashHandler.exe will not be running on the computer system anymore starting with the next start of the computer system (restart or kill the process for immediate effect).