Thanks for this Ann,
Sadly no different.
Followed the instructions. Rebooted, still the same. No change.
Are you running an Admin or normal user account? Try creating a new Admin account.
Thanks Jim (and Ann) for your suggestions, but yes I am running Admin.
However here is what I think has been happening:
I bit the bullet and started to clean out Adobe for a new fresh install, preferring not to go for a total reformatting of the C drive. During the process the SSD C drive suddenly died - the motherboard controller refused to port the SSD - my C drive was dead in the water. Substituting a HDD drive for that port showed the problem to be the SSD.
I have been using the OCZ Vertex 2 120GB (SATAII) as my C drive for about 12 months.
I did a little research and there does appear to be reports of a variety of failures.
I used the SSD just for OS and Programs (my pagefile was removed to a faster RAID 0 pair).
Today I used a new spare WD Caviar Black 500Gb HDD for my OS and reinstalled Production Premium CS5.5 from disks.
Success! Although I had the errors reporting at the end of the installation which I now know to be false errors due to having a later install of Adobe Flash.
The serial number activation I reported, missing codecs AME and AE output template issues are now resolved.
It is very possible I had some partial file corruptions or whatever the SSD was doing prior to its failure - in 20/20 hindsight there were signs over the last 2 weeks. I even had random error x116 (blue screening of my GTX580). And it was during an Adobe application install I had another x116 error and the SSD went belly up.
The OCZ is being RMA'd and I think for the time being I will stick to HDD for the C drive, because it does appear everything is just flying at the moment.
What a difference sometimes a good clean out makes every so often.
Hope this helps someone else.