Error code 1406 is a run-time error that occurs when you run the  program. 

Causes of QuickBooks Error 1406

- It is caused by other third-party software such as  MSXML, Microsoft .NET Framework, or C ++.

- Do not have the credentials to run Windows Vista or Windows Administrator on your system.

- You will not be able to access the installer with a corrupted Windows registry key. 

- Multiple users are trying to download QuickBooks software at the same time. 

Below are several Solutions to Resolve error 1406

Solution 1: You need to turn off any anti-virus or security-associated software

Solution 2: Use QuickBooks Install Diagnostic Tool (QIDT)

- First, need to download the QIDT

- Save and run QuickBooks Installation Diagnostic Tool

- Finally, reboot the working system.

Solution 3: Check for Windows Updates

Solution 4: Go for the Repair Registry Damage Solution