Great, OK..
I have a Win7 Based system with an AMD Dual Core Processor and 4 GB Ram.
I have a motherboard with on-board HD Audio.
I have two small Logitech computer speakers.
I also have a Yamaha P-85 Digital Piano with a USB UNO MIDI connection.
The MIDI Audio Setup is as follows:
Use VST/DXi is checked.
Route MIDI through to MIDI Driver is checked.
MIDI Input = No MIDI Input
MIDI Output = USB Uno MIDI - This used to be set to MS GS Wavetable.

Thanks tim