To resolve issues that prevent QuickBooks Desktop (QBDT) from opening, we can use the Tool Hub to clear any stuck background processes and repair the program.
Here's how:
Exit QuickBooks first.
Download the most recent version (1.6.0.8) of the QuickBooks Tool Hub. Save the file somewhere you can easily find it (like your Downloads folder or your Windows desktop). Note: If you've installed Tool Hub before, you can find out which version you have. Select the Home tab. The version will be at the bottom.
Run the file you downloaded (QuickBooksToolHub.exe).
Follow the instructions presented on your screen to complete the installation, and agree to the terms and conditions.
Once the installation is complete, open the tool hub by double-clicking its icon on your Windows desktop.
Note: If you can't find the icon, do a search in Windows for QuickBooks Tool Hub and select the program.