Download Creative Sound Blaster X-Fi 2.18.0013 for Windows XP, Vista and Windows 7.
This download is a driver providing Microsoft® Windows Vista and Windows XP support for Creative Sound Blaster X-Fi series of audio devices. For more details, read the rest of this web release note.
Beta version was out a while already, but this is the final version. Also the 1st official Windows 7 driver for X-Fi.