I really dont know what to tell you. Someone here mentioned that the boot loader is probably looking for the previous installation you had. Which is now gone and replaced by the new installation. I dont know if it would work if you boot from the live disk (Installation disk) run gparted and delete all the partitions to make sure there is absolutely nothing in the disk. Then install again on the blank hard drive. I mean to make sure there is no traces of your old installation on the disk.

But I am just guessing here. I had some problems with the boot loader before but nothing like this.

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I am not familiar with this boot repair disk but they can be very basic and even fit on a floppy disk, or it might stop when it finds a previous grub installation, bit pointless if it is ment to repair?
You could run the original installation disk as live and do:

install-grub /dev/sda

then:

update-grub

and see if it picks up on an installed version of GNU/linux, ie Lubuntu,etc

If it does then it should boot up ok.

If not try the live disk again and see just what is on the hard drive, also run a smartctl test on the hard drive to see if it is responding correctly, might be nackard.

Fred.

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Is the boot repair perhaps merely guiding you through the boot process (possibly successfully), but not writing the necessary data to disk?

If you can use the "boot repair" as a way of booting into Linux, the installation section described in
https://en.wikipedia.org/wiki/GNU_GR...n_2_.28GRUB.29
looks like it ought to be useful (possibly)...

I have used the cd to reinstall lubuntu and not done any updates and it is working. It is much faster than Ubuntu on this pc but I must say I prefer the display of Ubuntu and may go back to it. Once I am familiar with it I aim to multi boot it on my main pc which I built earlier this year with an Asus Haswell mobo and 4670k cpu with 8Gb of ram running Windows 7 Pro. Thanks to everyone for the help given I will mark this as soled. Thanks again.

Yes! Your newer computer will handle Ubuntu very well with the other graphical interface. Lubuntu graphical interface is very basic but under that GUI you have a full Ubuntu installation so you can do the same you do on the other. Wish you best luck to you, and if there are more issues come back here.