QuickBooks may keep crashing due to software bugs, corrupted program files, outdated versions, or insufficient system resources. It can also occur when the company file is damaged or when conflicting applications interfere with QuickBooks. To fix this, ensure QuickBooks is updated to the latest version, clear cache files, and repair the software using the QuickBooks Tool Hub. If the issue persists, try opening a sample company file to determine if the issue is with your company file or the software itself. Reinstalling QuickBooks using the Clean Install Tool can also help resolve persistent crashing issues.