Type 'regedit' without quotation marks and hit enter.- According to Marc, Backing up ' HKEY_CURRENT_USER\Software\Google\Drive' Registry Key on Windows is advisable, if you are a Windows user.Mac OS: ~/Library/Application Support/Google/Drive Windows Vista and later: %USERPROFILE%\AppData\Local\Google\Drive Windows XP: %USERPROFILE%\Local Settings\Application Data\Google\Drive The path for this folder may varies based on different operating systems. Backup Drive folder that contains metadata and sync logs.Quit Google Drive service and don't start it again until you complete the installation process.