QuickBooks Error 15240 usually occurs during payroll or QuickBooks updates. It often shows messages like “File specified cannot be opened” or “Internet connection error.” The main causes include incorrect system date/time, misconfigured Internet Explorer settings, or lack of admin rights. To fix QuickBooks Error 15240, make sure you run QuickBooks as administrator, correct your system clock, and verify your internet security settings. Updating Windows and QuickBooks also helps. This error may block payroll updates, so resolving it quickly is essential. If the manual methods seem confusing, an expert can fix it remotely within minutes.
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