QuickBooks Error 404 randomly occurs at any screen while working in your QuickBooks. The elementary cause of QuickBooks Update Error 404 is when QuickBooks fails to sync with Intuit Servers. In order to receive, send or download the information for internal service requests from within QuickBooks to fetch from Intuit Servers. The interruption or failure of the Internal Service Requests results in Intuit Error 404. However, QuickBooks Runtime Errors are referred to as QB update Error 404. Never be puzzled as the QuickBooks Error 404 is also titled differently at times.