Fix It or Nix It: Your Guide to QuickBooks Error 12009
The QuickBooks 1200 error series includes the QuickBooks error 12009. It happens during routine software upgrades or when a user attempts to download or update the QuickBooks Payroll service. When the installation procedure is interrupted by an unexpected loss of internet connectivity, the error message occurs. As a result, your productivity is interrupted when QuickBooks error code 12009 prevents you from using the QB desktop.