QuickBooks Tool Hub Download is beneficial in many ways Pick Program Issues If you have poor performance, difficulties starting the application, Error 6123, and the program crashes or stops working. We advise starting with Quick Fix my Program. This section can also be used to troubleshoot typical problems with PDF and printing. If you encounter an issue during the installation or removal of QuickBooks Desktop, choose Installation Issues. You can fix 3371 problems as well. To use standard Windows keyboard shortcuts to assist in troubleshooting standard QuickBooks issues, select Advanced Tools.