When installing or updating QuickBooks, problems with the Windows operating system's registry settings can result in QuickBooks Error 1402. Insufficient permissions or corrupt registry keys are the usual culprits. The installation or update procedure cannot be successfully completed because of this issue. To fix the error and carry out the installation or update process, troubleshooting procedures include altering registry permissions, running the QuickBooks Install Diagnostic Tool, or contacting technical support at 1-855-856-0042.