QuickBooks Error Code 15106 usually appears when you attempt to update payroll or QuickBooks Desktop. The message often highlights issues such as restricted administrator rights or third-party antivirus software interfering with installation. To solve QuickBooks Error Code 15106, try running QuickBooks as administrator, checking system settings, or uninstalling conflicting security software. This ensures payroll updates install smoothly without interruptions. If the issue persists and continues blocking payroll updates, call +1-866-408-0444 to get complete assistance for resolving Error 15106 and restoring normal functionality in QuickBooks Desktop payroll update processes.