DVD drive for IBM T21 laptop

I have an employee that has Windows 2000 installed on an IBM T21 laptop. His DVD player isn’t recognized, within Explorer. If you go into Device Manger it shows the DVD player, but has a yellow exclamation point next to it. If you go into the properties of the DVD player it says “Your registry could be corrupted: Code 19”. My question is, how would I go about fixing this problem??