Cannot load the game

[jens]

Do a normal uninstall using the uninstall program that came with penumbra.

Go to My Documents/ and delete the folder Penumbra Overture

This completely uninstalls Penumbra, but there might by other steps you need to do that is depending on Gamers Gate software, so for that you will need to contact them.

I'm also not sure on the administrator and activation problem as I do not run Vista myself.

If there is a problem with the serial for launching the game then you have to contact games gate as well for that because that is part of their protection system and I do not know how it works.