• Open Group Policy Editor (gpedit.msc).
• Navigate to: Computer Config → Administrative Templates → System → Device Installation → Prevent installation of devices not described by other policy settings → Enable.

Offline distribution

– For air-gapped systems, contact technical support to request a physical media kit.

Conclusion

• Checksum mismatch → Re-download; avoid using download managers.
• “Incompatible hardware” error → Verify your base model is R12943-mj2 (not mj1 or mj3).
• Download timeout → Use a wired Ethernet connection or request a segmented download link.

Select File:

Choose the R12943-MJ2-R5370 file and start the process. Do not power off the receiver during the update. Troubleshooting & Precautions R12943-mj2-r5370 Software Download