The error would probably have occurred due to a corrupted dynamic link library file, also known as the DLL file. Other issues that lead to QuickBooks error 80029c4a are missing out of some necessary QuickBooks files, incorrect antivirus firewall configuration, or any third party application hampering the QuickBooks operation. The first step to resolve errors 80029C4a is configuring your antivirus firewall to allow some specific QuickBooks files. Make sure that your antivirus program does not quarantine the following files. Those are –

· autobackupexe.exe

· DBmanagerexe.exe

· Filemovementexe.exe.

· QuickBooksmessaging.exe.

· QBW32.exe

· QBserverutilityMGR.exe

· QBlaunche.exe.

· QBupdate.exe.

· Onlinebackup.exe

The next step is to repair the QuickBooks installation, and for that, you will have to visit the apps and features in the settings menu. Now search for QuickBooks in the search box. After that, you can click modify from the list of installed apps to get an option of repairing the QuickBooks installation. Have you followed all the steps? Now verify whether the error 80029c4a resolves or not.