Ubuntu won't start

[Grekkostas]

Hey guys, first of all sorry for my english but it's not my native language
I am having problem starting ubuntu . I used to use ubuntu but after an upgrade they crashed
This is what i get when I try to start them :

GNU GRUB version 1.99-12ubuntu5.1

Mnimal BASH-like editing is supported , For the first word , TAB lists possible commant completions. Anywhere else TAB lists possible device or file completions
grub>

What do I need to do to get ubuntu back ?

[oldfred]

Post the link to the BootInfo report that this creates. Is part of Boot-Repair:
https://help.ubuntu.com/community/Boot-Info
Boot Repair -Also handles LVM, GPT, separate /boot and UEFI dual boot.:
https://help.ubuntu.com/community/Boot-Repair
You can repair many boot issues with this or 'Create BootInfo' report (Other Options) & post the link it creates, so we can see your exact configuration and diagnose advanced problems.
Install in Ubuntu liveCD or USB or Full RepairCD with Boot-Repair (for newer computers)
http://sourceforge.net/p/boot-repair/home/Home/
https://help.ubuntu.com/community/UbuntuSecureRemix

You may be able to boot and repair from inside your install.

Grub Rescue Prompt Megathread - drs305
http://ubuntuforums.org/showthread.php?t=1594052
HOWTO: Boot & Install Ubuntu from the Grub Rescue Prompt
http://ubuntuforums.org/showthread.php?t=1599293

[Grekkostas]

I didn't get you very well , which link should i post to the boot info ?

[oldfred]

You download the Boot-Repair script into any working Linux, an install or liveCD/DVD/Flash drive.

Then you run script and if you have Internet connection it will automatically upload a lot of data with details of your install to pastebin.
It gives you the link to post here, so we can see your data.

[Grekkostas]

Yeah , but my problem is that it won't start .. Linux does not start and i am stuck with windows now

[oldfred]

Is this error from the liveCD or flash?

[Lisiano]

Yeah , but my problem is that it won't start .. Linux does not start and i am stuck with windows now

oldfred meant you can use a LiveCD/USB (The CD/USB you used when you first installed Ubuntu) to run boot-info/repair.