You’re doing something important and you discover that QuickBooks has stopped working . The QuickBooks must have stopped working due to a variety of reasons. There is a possibility that the software must have got corrupted. The files of the QuickBooks must have been damaged. There could be no internet accessibility. The firewall or antivirus must be stopping the start0up process of the QuickBooks. There must be something wrong with the Windows registry files. Something must have gone wrong during the updating process of the QuickBooks.