Are you saying it was originally installed by us from the factory on the Alienware Aurora? I do not see it anywhere on the Aurora drivers page.

The Aurora-R1 shipped with the Realtek 888 HDA 7.1 and the Sound Blaster X-Fi.
The Aurora-R2 shipped with the Realtek 888 HDA 7.1, Sound Blaster X-Fi Extreme Audio, Sound Blaster X-Fi Titanium.

Hi Chris,yes  it came preinstalled on my alienware aurora, im in the UK dont know if that makes a difference, ive searched high and low for it but cannot find it and was the creative thx trustudio pro.

http://www.creative.com/oem/technology/thx.asp

Not sure how you got it on your machine without buying a dedicated Creative sound card.

However, over the years of buying Dells online ... I have seen "Software based Creative Sound Cards" offered ... to be used with on-board integrated sound cards. I have never purchased those options or really know how it works. I wonder if it's something like that?

Hi tesla, yes that was the exact software suite that came with my pc with no sound card lol, just the onboard 7.1, which i may add is still good. the software did sharpen the sound somewhat so i`ll keep looking for it. strange how dell installed it in the first place???

Well, you said you checked the (special, secure, online) My Dell Downloads area, but that is where these people found it:

http://en.community.dell.com/support-forums/desktop/f/3513/p/19335097/19706869.aspx

Note, this is not the normal support.dell.com file area.