hey irish, welcome to pchf.......go to start > run > type eventvwr.msc > enter, that will open up an explorer-like window, click on the apps or system folders on the left, and look for any exclamation points on the right. Where you see exclamation points, double click them, and see if you can find some for atipa, or something related to the optical drive. Whenever you find one that looks like that, click the two pieces of paper to copy it to your clipboard, and then post it back here. If you could post like 5 or 10 of them that would give us a good idea of what is going on.
Ask if you don't understand what I'm saying; half the time I'm unsure myself.
Thanks,
v