I had this problem with a wubi install. Ubuntu would highly pester me and drop to command shell (that of grub) without showing the boot options (Why and who knows??). I every time will have to boot by manually entering boot options (really painful). So I did this. I entered the boot command of the “recovery console” manually by finding it out from grub.cfg through the Live CD. After getting to the repair option I selected the option “Update GRUB”.
I wasn’t aware of this tiny little thing - the filesystem in the file created by a Wubi install can be easily mounted as a loop device.