Hello John and Noel,
Thanks for the information.
Before I actually read your information, I was busily engaged in uninstalling Garritan AND Acid Pro.
Uninstalled Acid pro
Uninstalled Garritan for Acid Pro
Uninstalled Aria player
Uninstalled Garritan Aria player
Downloaded Garritan PO
Extracted to ‘K’ drive
Installed Garritan again.
I now have Garritan PO up and running... I downloaded one of my Orchestral pieces and where it should be lush, it was, however all of my other instruments were gone. I suspect that is because I've got a whole more lot to learn about the interaction between Garritan and the various PG programmes.
Your advice has been great and I appreciate it, one more question. Can you advise me on programmes (Garritan etc) which would be useful to me in getting all my instruments back, so I can include the best samples. That may sound a little confusing, I think....

Best regards.
Ken.