How to partition HDD and dual boot Ubuntu with Windows 7 (first installed win7)

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http://askubuntu.com – Hello'World'! I am coming from another planet (Windows planet) but i'm friendly and i hope you are also !?! I recently bought a new hardware (a laptop) because i got accepted at a good Computer Science University in my country . I also heard that we're going to study Linux alot so i thought why not getting started with it . I tryed some Virtualization in Windows for Kubuntu 8.x(an older version) and now Ubuntu 12.04 . For a few days now i'm getting more into Linux, and i decided to not just use it in VirtualBox. So i kept on this new machine, when i partitioned it, some unallocated/free s (HowTos)