It shows as running in Task Manager, so I know Poser is opening and running but the icon is dumping to the taskbar and no amount of clicking will maximize Poser. At first I thought it might be a problem with the fancy Windows 7 interface, so I turned it off and enabled the basic taskbar and still Poser won't pop up.
It's after midnight in Ireland so I will retire now and try again after work tomorrow. Thanks for your help so far.

BTW Anthanasius is that avatar picture of you or one you made up? It reminds me of the neighbour girl next door in "Two and a half men". We get that here and my son magically has every TV in the house switched to that when it's on.