This question already has an answer here:
I'm using Ubuntu 14.04 from wubi application with Windows 7 as partition. I was using ubuntu for some time. After that it freezes for some time and I shut it down by long press on the power button. when I start ubuntu again it doesn't boot and it gives me
Minimal Bash-Line editing is supported. for the first word. TAB lists possible command completions. Anywhere else TAB lists possible device or file completions grub->
but I can still sing windows. Can anyone help me to reboot it again or at least to restore my files from my home directory ?