I have managed to install the driver.
To successfully install it I uninstalled the current driver but did not restart avoiding
re-installation of the Generic driver.
The laptop was originally an XP machine..... so
Then I right clicked the required driver package, selected properties and
checked the boxes to run the driver installation in
1. XP SP3 Compatibility Mode
2. Run as Administrator.
Installation went fine after that.
All seems okay for the moment with respect to audio functions.
Thanks for the responses.