Troubled by QuickBooks unexpected error 5? Well, as the name suggests, it is an unexpected error that can blow up on your system screen all of a sudden. This particular error shows up when the QuickBooks database service is unable to access the company file due to issues like in case of file corruption, network problems, or user permission issues. To get a better understanding of QuickBooks unexpected error 5, make sure that you stick to this segment till the end. This segment will help you understand what this error is all about and what actual factors can lead to QuickBooks unexpected error 5. Not just that, below we have tried to summarize the common fixes of this error as well.