Why not? They are just files.

First you need to connect the two computers or get a hard drive to use between them or something.

Then drag and drop the folder

Users >(YOU)>Music>iTunes>iTunes Music

Into the open iTunes window on the PC. If there is DRM purchased music, then you will have to register that computer to use those files.

Done.

Absolutely you can. Just copy the data over via your favorite method and you should be able to drag them right into iTunes. Files purchased from the iTunes Store will need authorization, but iTunes will ask you for that.

One good way to do it is to burn CDs or DVDs of your music. But treat the music like data, not like music. What I mean is, either copy your itunes folder (or part of your itunes folder) to disks like you would if you were backing up or send any other data files. Or, in your iTunes Prefs, under Adanced, select Burning, and then select Data CD or DVD.

Burning all of your music to disk this way takes less time and disks than if you were making tradition CDs or even MP3 CDs, but more time than some other methodes of file transfer. The other benefit, though, is that you get a back up of your iTunes. Also, this way, you are not converting from one kind of musical compression to another, so you do not lose anything.

Once your data disks are ready, you can just pop them into the laptop, and drap the files to iTunes. All of your meta data and everything will remain intact. This will not transfer your playlists. You will have to recreate them on the new machine.