When Windows components or.NET Framework files are damaged during installation or upgrades, the message QuickBooks Event ID 4 Unexpected Error 5 displays. Payroll or access to company files may be disrupted. To fix the problem and get application performance back, try running QuickBooks Tool Hub, updating drivers, repairing Windows components, or reinstalling Microsoft libraries. For help, contact a QuickBooks specialist at 1.855.738.2784.