QuickBooks stopping unexpectedly can indicate serious underlying issues, such as corrupted company files, damaged installation, or third-party conflicts. First, restart your computer and attempt to launch QuickBooks in safe mode. Use QuickBooks’ built-in repair tools to fix damaged files. If the problem persists, reinstall the application cleanly. Ensure your system meets QuickBooks requirements and avoid running multiple heavy applications simultaneously. Preventative maintenance, such as routine backups and file verifications, helps protect your data and minimize disruptions from unexpected software crashes.