The old Google Drive standalone Windows application has now been replaced by either Google Backup and Sync or Google Drive File Stream. Google Drive File Stream lets you access your files in Google Drive as if they were stored on your computer. It does NOT however backup your computer's file to Drive. For that reason, we are recommending everyone move to Google Backup and Sync instead.
Your computer will now continuously backup to Google Drive. If your computer or hard drive crashes, you will not lose any of your important files. You'll also never have to worry about whether your files are on each computer you may be using.