The entitlement file tells QuickBooks your product is valid and registered. Find the file and delete it so you can reenter your license and product info.
Open the Windows Start menu.
Type "Run" into the search and open Run.
Type C:\ProgramData\Intuit\Entitlement Client\v8 and then Enter. If this doesn't open a folder, enter C:\ProgramData\Intuit\Entitlement Client\v6 instead.
Find EntitlementDataStore.ecml. Right-click the file and select Delete. Select Yes to confirm.
Open QuickBooks and your company file.
Follow the on-screen instructions to register QuickBooks again.
Solution 2: QuickBooks Clean install Tool Desktop
If you still see the error after a clean install, you’ll need to work with a qualified IT professional or contact Microsoft. There may be damage to your Windows Operating System.
Before we get started, here are a few things to remember:
The QuickBooks product portfolio is full of nuance: There are minor and easy to overlook differences between software editions.
QuickBooks product features can also change.
Products even become discontinued from time to time, so be mindful of this when you shop for software.
How to Download QuickBooks Diagnostic Connection Tool?
1)Download the software from the genuine website of QuickBooks.
2)Save the downloaded application on your framework
3)Close every one of the projects running in the background of your system
4)After launching the software, restart your PC.