Steps to Fix this QuickBooks Stopped Working Error: Launch the Anti-virus software you use in your computer. If you are not using the latest version of any Anti-virus upgrade it to save your computer from virus attacks in future. Start the Full system scan in your computer to remove every possible virus or malware. Check your HDD and clean all the corrupted and damaged files from your computer. Update your QuickBooks software to the latest version. Launch the QuickBooks software and scroll down. Click on the updates at the bottom left corner, this will open your web browser and take to the link to update the QuickBooks.