Windows is logging, on a fairly regular basis, errors with my DVD drive...
It's a reader from Lite-On:
(16x IDE DVD-ROM)
Anyway, they're warnings, with the following information:
"An error was detected on device \Device\CdRom1 during a paging operation."
It refers me to a link for more help that has no useful information.
To the best of my knowledge, the drive works just fine. I haven't noticed any loss of data or any other problems... but this seems to happen daily.