Did you Dual boot or install via wubi ?

Wubi install = you booted into windows, then inserted the cd and selected install into windows.

No its installed as a separate operating system so that when the computer starts up I can choose either Windows or Ubuntu.

Thanks,

Alex

Produces the same errors I gave earlier

Should I just reinstall ubuntu?

Alex

Are you sure you have not removed the Linux partition?

How would I have done that and how would I check? How would I fix this?

Thanks again,

Alex

I do not know how would you have done that. I am not saying you have. You can check by booting Live cd and checking with
sudo fdisk -l.

It should show you all the available partitions on the disk.

as chaitanya told, can u post the output of "sudo fdisk -l" command. Can you able to see the partitions? (whatever, it may be linux or windows filesystem)

This is the output of fdisk -l command in my desktop and i am also having dual operating system.

Disk /dev/hda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/hda1 * 1 2550 20482843+ 7 HPFS/NTFS
/dev/hda2 2551 8163 45086422+ 7 HPFS/NTFS
/dev/hda3 8164 8176 104422+ 83 Linux
/dev/hda4 8177 9729 12474472+ 5 Extended
/dev/hda5 8177 9470 10394023+ 83 Linux
/dev/hda6 9471 9601 1052226 82 Linux swap / Solaris
/dev/hda7 9602 9632 248976 8e Linux LVM
/dev/hda8 9633 9663 248976 8e Linux LVM
/dev/hda9 9664 9688 200781 8e Linux LVM
/dev/hda10 9689 9695 56196 fd Linux raid autodetect
/dev/hda11 9696 9702 56196 fd Linux raid autodetect

And Ensure that there should not be a hardware (harddisk) problem. Can you boot into windows?