QuickBooks Unrecoverable Error is often seen when the user tries to open QuickBooks Desktop or work in it. It generally occurs because of outdated software or Windows version or other system glitches. To remove this error, you can Rebuild or repair the damage in the QB company file by following the steps I have mentioned:
Click the File menu. Hover over Utilities and click Rebuild Data.
Hit OK on the QuickBooks Information window and save a backup by following on-screen guidelines.
The tool may take some time to repair. Although it may appear like QuickBooks is stuck, if the mouse is working, the tool is processing.
Press OK when the process is done.
Now, click on the File menu and hover over the Utilities option to choose Verify Data.
Allow the tool to verify any problems. Click OK if there is none. Click Rebuild Now if QuickBooks detects any issues.
These steps must have solved your QuickBooks Unrecoverable Error. If the error is still in view, call 1.855.738.2784 for assistance from QuickBooks support.