Boot Menu Start up OS selection issue

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http://askubuntu.com – I installed Ubuntu 12.04 and after installing when i restarted the laptop i kept getting blank screen. Then i tried to uninstall ubuntu by EasyBCD method and when i went into disk mgmt there was no partition created. Now when i start my laptop i get option to select windows and ubuntu and whn i click on ubuntu it says the .mbr file is not there. Then I tried to install it again and now on start up while selecting the OS i get windows and ubunt twice. Please help !!! I am new to ubuntu and need it for my college and learning C and that is why trying it out. Thank You (HowTos)