Locate the QuickBooks Desktop icon and press and hold the Ctrl key on your keyboard.
While holding down the Ctrl key, double-click the QuickBooks Desktop icon.
Continue holding the Ctrl key until you see the "No Company Open" window appear.
Once the "No Company Open" window appears, you can select the desired company file and click "Open"
If the problem persists, restart the process and open the sample file. Did you still encounter the same issue?