[ubuntu] windows emulation issues

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http://ubuntuforums.org – im trying to install minecraft but cant seem to get the WINE to work or even find it. its listed in my applications under installed software in the ubuntu software center but i cant get it to launch or even find it when i go in through the dash. actually im having a few issues. i try to get a whiteboard app to experiment with but it says its not in my sources and i have every source i can find enabled. (Hardware)