Includes download links
Windows
Stop the process either by using Task Manager. You will need to look for "Google Drive" as seen in the picture to the right
Mac
Use Activity Monitor to end the Google Drive process
Next, follow the instructions below to start the Google Drive process again.
If you see the "location is not available" error, it is because Google Drive probably isn't running in the background.
Look for that application and click on it, that should make it run
On Windows:
Go to Start Menu
All apps
Scroll down to "Google Drive" and click on it
On Mac:
Open the LaunchPad (where you see all your apps)
Scroll around and find "Google Drive", click on it