I think I messed up my computer.  It doesn't recognize it has a "D"
drive--the CD drive.  A while back I made some changes to the startup
on msconfig that were recomended, but I forget what they were.  It was
some time after this that sometimes it wouldn't read a CD or DVD.
Sometimes retrying it helped.  Eventually it stopped working all
together.  I put off doing anything but now I really need it.

I tried system restore but this didn't help.  I don't know if the
startup change made a difference or not.  I don't know if this is a
software or hardware problem.  Please help!

Rick