|Is this a cd or a dvd? A cdrom cannot read a dvd it needs to be a dvd drive.|
Is this a factory cd or a burned (home made)one. Older cdroms have trouble reading burned cds.
Not every burned cd or dvd can be read by other computers.
Or is this a floppy, (You mentioned slot). A floppy formatted in win3.* ,95 is different than the format used in xp. There is a means to get xp to read a floppy with an older format type.........Sorry it escapes my memory at the moment....