I've now carried out 3 fresh installs and one update.
Pleased to confirm that they've all gone smoothly.
Paradox 9 continues to operate perfectly with no issues to report yet.
The update installation was to an Aspire Revo R3600 that we use as our general web/email/facebook client. Contrary to some reports, the installation didn't take any longer than a fresh install - though this may be because it was relatively new and uncluttered.