>>Has the user got rights to update the likes of MSXML3R.DLL?
>
>InstallShield should throw an error if the user isn't an admin or power user, so I doubt they'd get this far if this were the case. However, I'd have to research whether a power user can overwrite sys files, so this might be the issue. I'll play tomorrow.

I don't think Power users can overwrite the files, they can add to the sys folder.

It's weird, because power users can "install" software, but if they can't update sys files, where's the logic in that?

Kev