Firmware is the basic operating system software to operate a device. Firmware updates provide bug fixes and/or new features to the system.
Manager Express makes it easy to administer new firmware to your players, but there are certain risks you should be aware of. Since upgrading involves erasing an old firmware and replacing it with a newer one, a failed firmware upgrade will leave you without a working system software, rendering the device unusable. You should proceed with caution when upgrading the firmware. DO NOT POWER OFF the device during a firmware upgrade. You may have to send back the player for repairs (under warranty terms) should failure occurs.