mckinnon micro is associated with Tagar. Again all these web sites cannot be found. Best guess is this company is out of business or else very derelict in their support infrastructure.
That being said the 760gxk8mc is listed as a Foxconn motherboard.
These drivers can be found here:
http://www.foxconnchannel.com/service/Downloads.aspx
You have to input this data:
Where it says: Specific Downloads Search: put
760gxk8mc
Then where it says: Select Type: put
Motherboard | Drivers
This will get you to this list:
On-Board Audio Drivers 760GXK8MC
760GXK8MC-ERS
760GXK8MC-RS
760GXK8MC-RSH 5.12.1.5410 25.3MB AMD onboard AUDIO drivers for 32bit. 8/19/2005
From here it is trial and error as I've no clue what the RS distinctions apply to.
If you try a driver that is not compatible it should let you know that. Then try another etc.