Soundcard features lost but I have sound

[MorseLady]

I have Windows XP Professional with Soundblaster Audigy II ZS. When I reinstalled Windows some weeks ago I had no trouble with the various features accessed from an icon in the system tray.

For the past few days I have been unable to access most of the features ie the EAX console, graphic equaliser etc from the icon in the system tray so I did a repair reinstall from the Creative Soundblaster installation CD just now but now when I click the icon in the system tray it says "the audio device supported by the application cannot be detected". I cannot even use the basic volume control.

I do have sound and device manager says all is working properly. Windows Media Player and my MP3 ripping devices are working correctly with access to volume.

I used System Restore to roll back to before I did the repair reinstall but I still cannot use the icon in the system tray.

For some weeks my second CD/DVD drive is reluctant to play music. Could this be because I created a second data drive recently and the drive letter has been replaced ie data drive 2 now has the drive letter that belonged to CD/DVD drive 2?

Autorun has stopped working.

I have other issues with my computer and part of the same problem I don't know. I have done a full defrag, cleanup and online virus check which found a downloader trojan. Please see my thread in Windows XP called "where is my topic" http://forums.windrivers.com/showthread.php?t=80479 as I feel this is all related.