still the nicest client on earth. And still the one and only real portable client! For me it works nice. But a friend can start the launcher, but if he press start-buttom he got an error. After starting again, he get no error by pressing the start-buttom, but Minecraft don´t starts anyway. So i think it must be a problem of my friends PC. He has Win8 64bit like me. But a Radeon graphics-card, not nvidea. But optifine works with radeon, too. He is using portable java and trying nonportable. What else can he try?