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you might find the launcher starts then doesnt do anything not letting you play. This is because it is trying to download a patch but pro7s crappy servers are down AGAIN.
to fix this open the file "C:UsersPublicSony Online EntertainmentInstalled GamesLaunchPad.ini"
edit the line "environment=psg" to ";environment=psg" - commenting it out. the game will now patch from the USA servers and work.
In addition you may want to create a new sony account and just lie that you are from the USA rather than UK, Germany or whatever. Then you can do stuff like let steam patch it for you, have access to station cash across other sony games and generally not be a second class citizen.