15240 | Update download/validation failed

What This Code Means

Where Users Usually See This Code

• Payroll/tax table update flows
• Program update utilities
• Background update agents

Why This Code Appears

• Proxy or firewall blocks the update service
• System time/time zone causes TLS validation failures
• Security inspection modifies certificates
• Update endpoints are temporarily unavailable

What Typically Happens Next

• The update does not install and the application remains on the previous version
• A retry may succeed after network changes or later

What This Code Is Not

• It is not a company file corruption code
• It is not proof the vendor account is locked

Troubleshooting Checklist

• □ Retry later to rule out vendor-side outages
• □ Verify system date/time and Windows updates
• □ Confirm proxy/firewall rules allow the vendor’s update endpoints
• □ Test using a different network to isolate local restrictions
• □ Use official vendor update tools and avoid third-party download sources

Notes And Edge Cases