I have succeeded in converting it to a basic disk again, I formatted and reloaded win 7 32bit, the key was accepted this time round.
I went back to boot with disk in got through to language and from there to command prompt, I went the list partitions and override route to start with no joy, I then went the volume route convert basic and it did, so just to be sure I run a clean plus a format, then exit and continued loading and it went smoothly.
I have learned a bit more and in the future I will check any cannibalised disk to make sure they are basic and usable.
Many thanks again.