Having successfully installed Platinum on one PC I am now having problems installing it on another PC. The error message I get on installing is:

'RTR Platinum v1.9 has not been installed for the following reason:

DATA\UI\UNIT_INFO\MERC\RTR_AOR_GERMAN_WARBAND_INFO.TGA: This file contains invalid data. (error 21FC)

You will have to run this utility again to completely install.......'

The only real difference in the PCs is that the problem one has Vista installed (instead of XP SP2).

Help!