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Possible Duplicate:
How to install software or upgrade from old unsupported release?

I am unable to install anything higher than ubuntu 9.04 on a computer, I cannot explain why, I have tried the live CD's for all the versions down from 12.04 and the only one that will boot up is version 9.04. Consequently, I would like to move up from this download to version 12.04 but I cannot because the repositories are no longer supported. And yes I have tried booting with live CD's, I have tried with usb, I have tried changing the bios, I have tried all the options that they say in the troubleshooting menu, please... There is something different between the versions though, the 12.04 version I just get a black screen with a cursor, while the other versions I get some text talking about something called PXE-2.1 adaptor, something PXE2.1 exiting and then windows starting up once more (and yes I have checked to see if the CD/USB was made correctly).

So back to my original question; how do I move from version 9.04 to version 12.04 using update manager right now...thanks

This seems weird

sudo apt-get install update-manager-core [sudo] password for lin: Reading package lists... Done Building dependency tree
Reading state information... Done update-manager-core is already the newest version. 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

How can it be the newest version, there must be something wrong

So now I have started to add the repositories for different versions of Ubuntu and it is upgrading to 9.10, which is a good start, so I think I just have to keep adding the repositories and trying to there any other help that anybody can give me????

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marked as duplicate by Jorge Castro, hexafraction, Anwar Shah, Tom Brossman, Uri Herrera Sep 22 '12 at 22:42

This question was marked as an exact duplicate of an existing question.

Can you tell us about the hardware you are trying to install it on. – Chris Carter Sep 22 '12 at 18:23
Tried both 32-bit and 64-bit versions ? – dixoncx Sep 22 '12 at 18:49

To get started, press Ctrl+Alt+TT on your keyboard to open the Terminal. When it opens, run the commands below to install update-manager-core if isn’t already installed.

sudo apt-get install update-manager-core

Next, run the commands below to open update-manager’s release upgrade file.

sudo gedit /etc/update-manager/release-upgrades

Look for prompt and set it to normal by editing prompt=normal. Save it and exit. Next do refresh your software cache and upgrade by typing

sudo apt-get update && sudo apt-get upgrade

After finishing this process run this following command to upgrade latest Ubuntu release.

sudo do-release-upgrade

If promot press Y and press enter.

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