QuickBooks Error 15103 occurs when a user tries to update payroll or QuickBooks Desktop, often caused by permission issues or antivirus interference. To resolve it, first ensure your Windows user account has administrative privileges. Temporarily disable antivirus software, then attempt the update again. Running the QuickBooks Install Diagnostic Tool can also repair damaged files contributing to this error. Maintaining updated Windows settings and verifying QuickBooks software integrity often prevents recurrence. Following these steps carefully ensures seamless updates and prevents downtime in financial operations, safeguarding payroll and accounting processes.

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