cd RW driver corrupted?

I had a problem with windows XP a couple of weeks ago.
The solution was to to a repair re-install from the xp
disc. While installing it said it couldn't
load "drivers.dll". Now my cd RW/dvd rom isn't working
right. It's unbelievably slow and won't run some
installation programs. It won't burn at all. The drive is
an optorite combo DC4801 from I/O Magic. The driver is
provided by Roxio, file version 5.3.5.10. I no longer use
Roxio or have the disc. There are no other drivers on the
computer. I have tried uninstalling the drive and
reinstalling it, rolling back the driver, (there are no
other drivers to roll back to). I have been trying to
install Nero burning, but the installation program won't
run off the disc and I don't know if there is a new
driver in the program or not. I searched the Microsoft
site but I couldn't find a driver to download. What do I
do now?