You've got payroll due in two hours. Three clients waiting on invoices. And you just double-clicked QuickBooks—the loading spinner spun, the icon popped up in your taskbar… but nothing appears on your screen. You click again. Nothing. You restart your computer. Still nothing. Now your stomach's tightening because you know the books won't run themselves, and the clock's ticking. This "QuickBooks open but not showing" problem happens more often tha...