Interrupted power supply or disconnected cables during the 90%-100% transfer phase can corrupt the bootloader, rendering the router permanently unusable.
The process typically runs to 100%. If it stalls (commonly at 96%), reboot both the PC and the router before trying again. Where to Find Firmware Files
Firmware is the internal software that controls your router’s performance and security. For the , updates can be handled in two ways: How to Check Modem Firmware - CenturyLink
: The computer does not recognize the TV box interface.