QuickBooks Error 15240 happens when you try to download QuickBooks or payroll updates. Incorrect Internet Explorer settings, misconfigured system date and time, or a lack of administrative permissions are frequently the causes. Checking internet settings, confirming the date and time, and launching QuickBooks as administrator are the steps involved in fixing the problem. Are you having trouble with QuickBooks? Dial 1.855.738.2784 to speak with an expert.