CDRW32.BDB cannot be found

I have an emachine computer, it was sent in for repairs few months ago,where he said he had put it back to how it was, but my photos etc., would not be lost! I just had to put adobe and other software back on! I pirchased AVG antivirus etc, as there where loads of virus on. It is a little slow at times but nothing else! I decided I wanted to burn some music onto cd and this is when I found the problem! I have tried nero,itunes and windows media player all to no avail! please can you help!