Thank you for your response. I've downloaded Image Burn but haven't yet had the opportunity to try it out. I'll try it out tomorrow along with an attempt to get Premiere to recognize my drive which again is fast and up to date.
My computer is a Windows 7 64 bit machine with 8 GB RAM and loads of free disk space. I suspect my programs are still the original 12 version but I have tried to invoke any upgrades in the past. It seems they must not have worked.
Regarding the Organiser problem, I have deleted the psa.prf file as you suggested but that failed to make any difference - the program still closes immediately after being launched. It doesn't stay open long enough for me to create a new catalog.
Do you have any further suggestions? And thanks once again for your help so far.
Garrysen