My drivers work (Windows XP) for my X-Fi XtremeMusic, they've always worked. The only problem I had was crackling noises, but that was due to the PCI nForce networking controller fighting with the soundcard during multiplayer games. So I changed my primary to the PCI-E networking adapter. Problems gone.
Thoughout this thread, wayyyyy more folks said they had no problems with the drivers just shows that that guy at Guru3D is FOS LOL! Most folks replying are nF4 users, not Intel as many of them never had any problems to start with.