Hold down the alt key once more. Click OK and hold down the alt key until your file is fully opened. QuickBooks should show an empty Desktop.

How To Unfreeze QuickBooks With Install Diagnostic Tool
QuickBooks Install Diagnostic Tool is another way that can help fix this issue. QuickBooks Install Diagnostic Tool (QB Install Tool) can help you identify any issues related to components in QuickBooks Desktop. Follow the steps given below:

Download the QB Install Tool or QuickBooks Install Diagnostic Tool.
When required, save the file to the Desktop.
Close all programs and open the QuickBooks Install Diagnostic Tool.
Depending on the internet speed and computer’s performance, the whole process may take 20 minutes to complete.
After running the tool, restart your system/computer to ensure all the components are correctly saved.
Note: QuickBooks File Doctor Tool can also help you fix any unexpected problems with the company file. Just download, install and run the QuickBooks File Doctor to recover from the QuickBooks freezing issue.

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