12.04 LTS : Win7 alongside installation not possible

[mike_abc]

Hi,

Ubuntu Installer (64bit) does not see my Windows 7, i.e. no option "Install alongside Windows 7" appears among the installation options.

I'd like to install Ubuntu on a partition (that does not yet exist), on the same disk with windows. The disk has plenty of available space, but its unallocated.
(Remark: Even if I wanted, I couldn't have formatted the partition from within Win 7 with ext4 file system, so...).

What am I to do ?

Cheers,

Mike

PS. I had no problem years ago to do this with Windows XP...

[Mark Phelps]

Boot using the Ubuntu install media. When you get to the desktop, open a terminal and enter "sudo fdisk -lu" (Lowercase L, not a one). That will list out the partitions and filesystems on the drive. Post that information back here so we can see it.