When I load a CD into the drive, ITunes will not add it, although I told it to

See Import songs from CDs into iTunes on PC - Apple Support. Can you import the CD manually despite the prompt not occuring? You might try changing that setting to something different, apply the change, then restore your preferred option and see if it now works.

tt2

Yes, you should be able to copy the files over just as they are. That said I think Windows will copy from CD as read only files. You might want to copy them to the Automatically Add to iTunes folder when iTunes is closed, select the files, right-click and click Properties, clear the Read Only attribute, click OK, then launch iTunes to add the content to your library. Otherwise you might not be able to edit of the metadata associated with the files.

tt2

iTunes doesn't monitor the contents of the media folder. If you add or remove items in Windows Explorer you may still need to update the library in iTunes. Occasionally Tunes will silently reject content you try to add to the library. Using the Automatically Add to iTunes folder helps with this as problem items are moved to a Not Added folder. It won't tell you what the problem is, but at least you know for sure that iTunes considered the file and rejected it. iTunes won't automatically eliminate duplicates and depending on where files are when you add to the library and the option to copy files to the media folder may quite easily create them should you ask it to.

tt2

Do other CDs work? What happens after you reboot your computer?

tt2