Antivirus software, preventing QuickBooks files or problems with out-of-date software, can also cause this error. You can get an alert such as 80029c4a. When attempting to launch QuickBooks, the error message Can\'t load dynamic link library (DLL) stops it from beginning or loading company files. We have created this section to assist you in resolving this problem by providing the full set of instructions for resolving this type of QuickBooks error. However, feel free to contact our QuickBooks error team at TFN at any time if you require any kind of technical assistance. You will receive prompt answers to all of your questions.