Error code 15240 Quickbooks can occur when you try to update your QuickBooks Desktops or download payroll updates. The error is usually caused by Internet Explorer security settings or by misconfigured firewall settings. The messages that appear on the screen when this error code is encountered are as follows:
“QuickBooks error 15240 – HRESULT XXXXX the QuickBooks update did not complete successfully”
“QuickBooks error 15240 – HRESULT XXXXX the payroll update did not complete successfully”