QuickBooks Error Code 30159 is a common error that occurs when users try to update or install QuickBooks. This error message typically states "Error 30159: QuickBooks was unable to complete the update." This error can be caused by various factors such as a damaged or missing installation file, outdated Windows, or security software interfering with the installation process. To resolve the error, you may need to perform some basic troubleshooting steps such as repairing the QuickBooks installation, updating Windows, or disabling anti-virus software temporarily