QuickBooks Error 15222 occurs during payroll or update processes, often caused by internet connection issues, antivirus software blocking updates, or outdated digital signatures. This error prevents downloading payroll updates or QuickBooks maintenance releases. Ensuring your antivirus software isn’t blocking QuickBooks, verifying internet settings, and updating digital signatures can help resolve this error. If you encounter any issue, contact the QB Support team, dial 1.855.738.2784.