UNO clone shows up as MEGA 2560 after burning bootloader

When I connect the board to a PC via USB, it shows up in my devices (Windows 7) as a Mega 2560. Every other one is listed as an Arduino Uno R3. I have several as they are used for an electronics class. Drivers can only be installed with admin rights, and this anomalous board is not recognized by the computers that only have had the Uno driver. If I update the driver using Windows and point to the arduino drivers, it says "driver successfully installed - Mega 2560".