Hi
After removing the software physically, (I deleted the folder), I installed the 2011 drivers from the DVD and the speakers started working again.
Live and learn.
My USB headset works too.
I guess I'll try again to remember "If it ain't broke, don't fix it!!!"
I can't think how many times I've said that, and then gone ahead and done it anyway, and regretted it!
I'll use these drivers from now until I'm 90.
Thanks for the help.
Mike