You seem to suggest that Quicktime maybe causing the problem.
Is there any way of updating, correcting this or removing it if not needed.
You'd do the opposite of updating.
You'd remove all "new" versions of QuickTime and use the version that came with the game.
Lagavulin used QuickTime 6.5.2. but the current version is at least QuickTime 7.7.7. If you've ever used a QuickTime updater, chances are that your QuickTime is too new for RHEM 1.