Disc Wiped Out Dvd Players

I wanted to download additional content from the XP installation disc. I selected add digital media from choices and clicked the button. It started analyzing the system then suddenly started deleting a whole slug of files. It finished and rebooted, after which neither of my dvd drives would recognize discs. Windows media player was gone too. Both player models show up on the add hardware list in control panel. I wrote down the models and downloaded drivers for one of them and it wouldn't install them because it said the drive wasn't present. The "add new hardware" said the same thing, though it was on the list.