[ubuntu] Installed Ubuntu but cant find it

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http://ubuntuforums.org – Hmm.. where to start. My normal os is win 7 but the other day i installed win8 on a second partition. Yesterday i decided to install Unbuntu alongside win8 but it doesnt show up when i start my comp.. just win8 and win7 shows up. It seems ive lost some memory on my c drive also. where do i find the installation and how do i remove it? Thanks (Hardware)