Fixing My MP3 Player Drivers?

ok so i had my mp3 about a year now and no real problems but for christmas i got a sound hat thing but anyways so i thought i would update my mp3 so i plug it into the comp but it says windows doesnt reconise the devise so i check all usb ports are fine so i try it on my bro's comp and it works (odd) try mine again i check what it has to say and apparntly its drivers have been uninstalled (weird) but when i plug it into ma bros comp it no longer works and says the same :(
is there anything i can do to fix this? it thinks its driver is uninstaled on comps but i havent changed anything since its last use... i dont know how to fix this, it did have a disc but the disk containts thousands of drivers and non i tried work =/ i really want it working again please so can anyone shoot idea's at me?