Following are the steps to fix when QuickBooks won’t open: Check for Updates: Make sure you have the latest release of QuickBooks installed. If not, download the latest updates and install them. Reinstall QuickBooks: If updating doesn't work, you may need to reinstall the software. Run the QuickBooks File Doctor: This utility can help you identify and fix common problems that may be preventing QuickBooks from opening. Check the Company File: If you're trying to open a specific company file, make sure the file is saved in the correct location.