Possible cause: 360 Security, Huorong, or another antivirus program has incorrectly identified the main program as a threat.

Solution: Check the quarantine area and restore the file. Add MFPlayer.exe to the trusted list. If the filename has been changed, rename it to MFPlayer.exe, reconnect the USB drive, and try again.

If the issue continues: Provide a screenshot of the error and the MFPlayer.log file located in Documents / My documents.

Possible cause: The application does not have permission to access removable volumes.

Solution: Open System Settings → Privacy & Security, select Open Anyway, and enable Removable Volumes under Files and Folders.

Open Settings → Privacy & security → Windows Security → App & browser control → Smart App Control settings, and check the blocking status. Please note that after Smart App Control is manually disabled, resetting Windows is usually required to enable it again.

The serial-number setting may be missing from Option.ini. Keep a screenshot of the error and contact the publisher or customer support for correction.

If the computer has an NVIDIA graphics processor, open NVIDIA Control Panel → Manage 3D settings and set the preferred graphics processor to Auto-select. If the issue continues, provide the application-error information from Windows Event Viewer.

Set Windows power mode to Best performance. The general recommendation is an Intel Core i5 processor and 8 GB of memory. For 16 Mbps high-definition video, an Intel Core i7 processor and 16 GB of memory are recommended.

Confirm that the speakers or Bluetooth headset are connected correctly, and select the correct output device in Sound settings. If software such as Voicemeeter is installed, switch to a different audio-output device.

Make sure Silent Mode is turned off, then start playback again.

Open Settings → Privacy → Special app access → All files access. Locate PUBLISH KING, enable permission, and restart the device from the system menu.

Antivirus software or Windows Defender may have deleted the files. Provide a screenshot of the USB drive’s root directory and contact customer support to determine whether the files can be restored. Do not add, delete, or rename files yourself.

Connect the USB drive to the adapter first, then connect both to the phone or tablet. If NFC detection does not work, turn off Airplane Mode. On iOS 26.1, use Mobile Device Compatibility Assistant on a computer to reset the USB drive first.

Turn off the screen, wake the device, and open the application again. If a permission message appears, select OK to allow access.

Yes. The online Authentication Edition can be configured for a limited period, a specified expiration date, or a limited number of logins. After expiration, the content cannot be opened, but the files remain on the USB drive.

The device-change and unbinding procedure is still being confirmed. Contact customer support and provide the product or project name, information about the original device, and information about the new device.