[ubuntu] ubuntu boot problem - wubi

view story

http://ubuntuforums.org – I'm using Ubuntu 12.04 with Windows 7 (Wubi installation) I encounter booting problem to Ubuntu many times (after choosing to boot to Ubuntu, it appears black screen). I try to repair by boot-repair. It worked sometimes. I have no idea how to fix it (is it about my hdd?) Here's an URL: http://paste.ubuntu.com/1279444/ Thanks in advance (Hardware)