Error 15103 in QuickBooks desktop typically occurs when attempting to update QuickBooks Desktop or payroll. It can be caused by various factors, including:

• Faulty Windows settings: Incorrect configuration or damaged registry entries
• Lack of admin rights: Insufficient permissions to install or update QuickBooks
• Corrupted files: Damaged or missing files in the operating system
• Incorrect installation: Improper installation of QuickBooks software

To resolve QuickBooks Error 15103, follow these steps:

1. Close QuickBooks: Ensure the software is closed before attempting any troubleshooting.
2. Reinstall QuickBooks: Reinstall the software to fix any installation issues.
3. Run a Windows repair: Use Microsoft’s built-in tools to repair damaged files and registry entries.
4. Download updates again: Try downloading the latest QuickBooks Desktop product updates or payroll tax table updates.
5. Check Windows settings: Verify that Windows settings are correct and administrator rights are granted.
6. Back up your company file: Secure a backup copy of your company file in case you encounter any issues using the program.

If the issue persists, consider seeking assistance from the QuickBooks support team or a professional accountant.