If you are referring to the blue box, this is something your motherboard's BIOS is generating. I would presume the BIOS is mishandling the display after execution of the RST Option ROM. You need to talk to your motherboard vendor regarding why this is.
Or are you referring to the RST display itself? This is appearing because you have the BIOS configured for RST operation and you do not have the BIOS configured to suppress this display.