Cd not being seen by windows

> Hi
> Windows will not see any of my optical drives, It did
> yesterday and when I go to my computer to look for the
> driver it says it is bad so I uninstalled it and
> rebooted. It shows the optical drives when it boots up
> but when I go to windows explorer it does not show the
> drives.
> Also the drives won't work properly. I put in Win XP cd
> to see if I could fix it but even though the drive light
> lit up and looked like it was going to read it but
> nothing else happened.
>
> I uninstalled some software today and stupidly
> clicked "yes to all" when asked did I want to delete some
> files e.g. dll's and I think this could be it.
>
>
> Any ideas would be very gratefully received as otherwise
> I will have to reformat the HD (pain in the bum). Please
> mail to [email protected]
>