NO Sound Need "Microsoft UAA bus driver for high definition audio

hi
I have a sound problem and am in need of this "Microsoft UAA bus driver for
high definition audio for Wiundows XP" do you know how i can get a copy of
this with out having to try and get it from the MS support site! it is not
help full and is some what out of date. i have found an HP vershon but will
not load on to a non HP computer some one must have a copy of this driver
please?
my Audio hard ware is Realtek ALC888s i have down loaded the updated driver
for windows XP (WDM_R186.exe) it goes throgh the motions of installing and
windows said it installed but no hard ware is found or displyed in device
manager.