There is a sound amplifier for square dancing, and the amplifier comes with a DVD and a USB socket, so why can the CD-ROM be played, but the USB flash drive can't be played?

Possibility : The driver of the optical drive is installed correctly. Or its driver is corrupted.

Generally in WINDOWS comes with the optical drive driver, do not need to add another. If the driver for the CD-ROM drive is installed with a driver other than its own, the CD-ROM drive may be missing. This situation is generally added to the so-called "optimization", "speed up the program" or other programs. This can enter the safe mode will be "Device Manager" in the "CDROM" option to delete, and then restart the computer, so that the system found the new hardware to reinstall the optical drive driver can be

Optical drive read performance is not good this case! This usually happens when you buy a newly assembled computer or a newly purchased CD-ROM drive.