Hello, @sallyb1.

Welcome to the QuickBooks Community. You're in good hands here. I'd like to share with you some insight I have on this issue. There are a few steps available for this specific type of Unrecoverable error. This can be caused by the QBCF Monitor Service or the QuickBooks Installation itself. Since you've already tried installing on a different computer and you're receiving the same results, I recommend trying to disable the QBCF Monitor Service. Here's how: 

• End the QBCFMonitorService.exe process.
  • Press Ctrl+Shift+Delete on your keyboard to bring up the Task Manager.
  • On the Processes tab, click the Image Name header to display the processes alphabetically.
  • Select QBCFMonitorService.exe. and click End Process.
  • Click Yes on the warning message.
• Prevent QBCF Monitor service from re-starting on the workstation.
  • Press Windows+R On your keyboard to open the Run window.
  • Type in services.msc and click OK.
  • Scroll down on the list and double-click QBCFMonitorService to open the Properties.
  • Choose Disabled as Startup type.
  • Select Apply and OK.

Try opening the company file once more. If you're still encountering the Unrecoverable error, I have an article for you that covers general troubleshooting steps for Unrecoverable errors. You can find that here: https://community.intuit.com/articles/1501515-unrecoverable-error-general-troubleshooting-steps . 

If you feel that you need help with any of these steps, you can reach out to the Customer Care Support team here: https://help.quickbooks.intuit.com/en_US/contact . Feel free to ask any questions you have here in the Community as well. Be sure to keep me posted on your progress with this.