It took a whole day or installing, uninstalling, rebooting, cleaning files, etc but finally worth it, I now have both PSE12, PS 12 and the Organizer working correctly. Not sure if this had any effect, but I had, for another reason, downloaded Winzip and it appeared some of the zip files in the Adobe download did not unzip (probably Organizer) ??. I finally got PS12 working on a new administrator. Rebooted got it working on my normal account and then tried PSE 12 several times and finally it worked too. After all this I installed the 12.1 upgrades and they worked first time as well.
I wish to thank all for there input as it was most helpful.
Ian