There’s been a lot of talk about this renogade OEM Gigabyte mobo – maybe too much talk.
mobo GA-8SIMLNF R2

Ordinarily the Audio_Realtek_5.10.0.5628_XPx86_A.zip driver crashes out with this dialogue box:

updatedriverforplugandplaydevices failed
-536870397

Solution.
Get hold of the R111.zip from I cannot remember through the madness of it all!
Which essentially the same stuff

Google “sis drivers windows xp 7012”

Go to the XP directory
And edit the SIS7012.inf file

At the end of the [SIS] section
add to end:
%SiS7012.DeviceDesc%=SiS7012, PCI\VEN_1039&DEV_7012&SUBSYS_200B1631

The Hardware ID key was missing so the mobo motherboard sound chip is screwy.

Job sussed – DONe