ubuntu wont install/run

It sounds like the CD you burnt may have been done incorrectly. Please read the guide here:
https://help.ubuntu.com/community/BurningIsoHowto

Hope that helps
Shane

Oh I didnt read it properly. Maybe its a problem with the bios. Its hard to say.

Check the Md5sum for the cd but really it sounds more likely that it's a hardware problem. Sometimes optical drives can be a bit weirdly tempramental. Can you plug one of the cd/dvd-drives from one of the other machines into this machine temporarily? Sometimes a drive will prefer cds that have been been made by itself also cheap cds seem to work better for this so if it's not a cheap cd then try again using the same drive you always use on the machine but a really cheap cd this time at the slowest burn speed the drive can handle.
https://help.ubuntu.com/community/HowToMD5SUM

Good luck and regards from
Tom :)

It sounds like you are doing the right thing. Booting up from the Cd through "Try Ubuntu without changes to this machine" should get to a working desktop that we call a "LiveCd session". It's usually a good plan to try out a LiveCd session of a linux before installing, just to see how easily things work and to make sure you are ok with the look&feel of the distro before installing it ;)

Of course the best way to install Ubuntu is as a dual-boot with this type of approach
https://help.ubuntu.com/community/WindowsDualBoot

So i think that was a good try - i hope it starts working for you soon ;)

Oh, it might be worth trying a different distro from a different family. I would recommend downloading a distro that can be used as a recovery or 'fix it' tool, particularly if that helps you fix Windows machines too. Wolvix Hunter is my favourite even though it isn't really a rescue disk, it boots fast into gparted and has the usual text editors and file-browsers and of course a grub installer along with OpenOffice, proper firefox and some pretty good fun retro arcade games - it's mostly made for programmers and people who need soft gentle restful colour-schemes after plugging away at dense code all night ;)
http://distrowatch.com/table.php?distribution=wolvix
http://distrowatch.com/table.php?distribution=systemrescue
http://distrowatch.com/table.php?distribution=partedmagic
http://distrowatch.com/table.php?distribution=knoppix
http://distrowatch.com/table.php?distribution=trinity
Knoppix is quite pretty and has extreme hardware detection, even more so than Wolvix - it's a good one for showing off to people on their own machine. The prettiness of the boot is due to it being from the Mandriva family. Trinity Rescue Kit only gets to a command-line, not a full gui desktop but it has a huge range of very effective tools for dealing with almost any problem a Windows machine might suffer from - definitely a 'must have' if you work and earn money by helping fix Windows machines but i prefer having a gui as i just don't know enough yet to use a cli instead. Anyway, it's worth testing out the cd/dvd-drive by trying out one of the above. Wolvix Hunter is smaller and should give a better result but whichever you try as a LiveCd i hope it helps you get Ubuntu installed on the machine ;)

Good luck and regards from
Tom :)