[Help] Error sound but no dialogue box

[Fr33m4n]

Heya guys, I'm having a very annoying problem. Do you know that sound windows makes when an app performas an illigal operation or does something bad. That slightly higher pitched 'ploink' type sound. Wll, I get that sound all the time now but I don't have any error messages explaining anything and I don't get any new entries in event viewer every time I hear the sound. I get the sound all the time at irregular intervals wheter I'm using the machine or not. I'm running a fresh copy of winxp pro nLited and updated with ryanvm's pack. I recently installed my audio drivers for my X-Fi card and I got this error message during install:

CTRegSur fails to register "C:\Program Files\Creative\Shared Files\WMaWrite.ax"

CTRegSur fails to register "C:\Program Files\Creative\Shared Files\Transcode.scm"

CTRegSur fails to register "C:\Program Files\Creative\Shared Files\WmaTag.mft"

However I'm farily confident that that's not the source of the error because I have removed the drivers and had windows install them itself from the driver cd. I also have KAV and LooknStop installed. help would be grately appriciated, thx in advance.