Finaly. I managed too get on my hands a laptop who has Wind 8. I instaled the game and guess what? the launcher works without a problem. OK. what now? So i wanted too go lower OS. First i try with the compatiblity from Properties : the launcher can be opened with every OS till XP were it gives an error. Next i can be sure i try a XP simulator on wind 8: it gives the same error as at the start of the post.
Conclusion: the launcher has been configured on a newer OS than XP and, probably, the admins (or programmers for launcher) forgot to check the options for lower OS. I'm not upset or anything for that matter but it's something that might be thought when u program something like a free program ( i understand that no one wants a XP too run like the Hachu said above). It might be fixed with a check on the options on launcher but till then i hope i can get somehow too play again (and for those who ask "Why dont u play on the laptop, daaaaw?", it's not mine "daaaaw").
Txs for the help so far and cya in the future