The QuickBooks Event ID 4 Error happens when the.NET Framework is in conflict, usually following a Windows upgrade or modification to the system settings. When QuickBooks initialization is interrupted by this error, an Event Viewer notice is displayed. Quick troubleshooting is necessary to get accounting back up and stop more software instability. Give us a call at +1.833.802.0002 if you would like to talk to a QuickBooks support specialist right away.