QuickBooks Error 140014 is an error code that users may encounter while installing or updating QuickBooks software. It typically occurs when the installer is unable to access necessary files or folders due to insufficient permissions or security restrictions. To resolve this error, users are advised to run the QuickBooks Install Diagnostic Tool, adjust folder permissions, disable antivirus/firewall temporarily, and perform a clean installation of QuickBooks. Seeking assistance from QuickBooks support or consulting the official QuickBooks knowledge base can provide detailed steps to resolve Error 140014.