Error 3371 QuickBooks occurs when the QuickBooks system file that is EntitlementDataStore.ECML (containing the QuickBooks license properties) is damaged or corrupted. Whenever the QuickBooks error 3371 occurs, a notification message appears saying QuickBooks could not initialize license properties. The following steps will elaborate on how to fix QuickBooks error code 3371.
Step 1. Firstly, you will need to delete the ECML file. For that, you will have to open the run dialogue box, type C:\program data\Intuit\entitlement\client\v8 and then remove the ECML file.
Step 2. Next, you will need to update the Windows operating system, which can be done from all program menus, and then click the Windows update.
Step 3. Additionally, installing the latest Windows update will also help you fix error code 3371 QuickBooks.