It sounds as if the wrong root partition is passed to your kernel when booting from grub. Just to be sure, you can boot windows from grub now, right? What you could do is edit the line in grub: select the line which boots ubuntu in grub and press 'e'. Then you can see the boot lines needed to boot ubuntu. Check that the partitions are ok. You can again edit the lines by pressing 'e' and confirming them with 'Enter'. And when done editing you can boot by pressing 'b'. Things to check: - Is the right partition loaded by grub? (in (hd0,0) format) - Is the right image loaded by grub? - Is the right root partition passed to the kernel? (in /dev/hda1 format). Good luck! <div>On 12/22/06, Cheatah 0#@!^ <<a href="mailto:cheataah@gmail.com">cheataah@gmail.com</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">This is a very common problem when windows is reinstalled. When Windows is installed it automatically overwrites the Master Boot Record (MBR) of the primary harddisk (which is listed first in your BIOS). When reinstall I simply change this order (I install windows on a separate physical disk) and after the install I change it back. This is the easiest way. >>>Your problem is easy to solve. Your partitions aren't gone, you just have to put back your grub MBR. If you didn't make a GRUB bootable disk, then you can use the ubuntu live cd and install grub on your MBR again. Just go to a terminal and type 'sudo grub'. Now, in grub you can do this: grub> root (hd0,0) If you are not sure which partition actually holds the boot directory, use the command find, like this: grub> find /boot/grub/stage1 This will search for the file name /boot/grub/stage1 and show the devices which contain the file. Once you've set the root device correctly, run the command setup: grub> setup (hd0) Succes! Rutger thank you 4 that reply. i went according to ur reply and was able to reinstate the boot menu, then i selected the ubuntu option from the menu, thats when things went wrong- a new screen saying "cant mount the patition................." comes up.actually i set hd0,7 as my root, but in the screen where the error message came it is written root(hd0,9). i had confirmed that the partition with the boot file was hd0,7. can u tell what exactly is the problem. Thanks. -- ubuntu-users mailing list <a href="mailto:ubuntu-users@lists.ubuntu.com"> ubuntu-users@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-users">https://lists.ubuntu.com/mailman/listinfo/ubuntu-users</a> </blockquote></div>