How to Troubleshoot the QuickBooks Error Code 1406?
Launch the QB Install Diagnostic Tool to troubleshoot QuickBooks Error Code 1406.
2) Disable the firewall and antivirus temporarily. Install with administrator rights.
4) Modify UAC configurations.
5. Test out Safe Mode or a clean boot.
6) Correct the QB setup.
7) Update QB and Windows.
8) Look for any system flaws.
9) Speak with QB support if necessary.

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