my CD burner will not work. Tried everything that hp says to do but no luck. My Directory shows CD drives to be M and N. Have a hp pavilion 8720 cto. Everytime I try copy something to disc, the pop down comes on and says insert disc which I have already done. Tried both M and N and when I cancel the message the drive jumps back on the C drive. Won't stay on M or N. Downloaded a file from hp for the driver but didn't work either. Pulling my hair out over this, as my computer is out of warranty by one day when I discovered this.