You may encounter QuickBooks Event Id 4error if there is corruption in the QuickBooks company file. Many other reasons are found to be responsible for the issue, but we have listed some of them here: if QB installation files are damaged by the malware or virus, wrong installation of QuickBooks, if QuickBooks registries in windows get damaged. For more information, refer to this short guide; else, you can connect with our Pro Advisors team by dialing this number +1-855-856-0042.