So far I have had three different representatives, the last of whom stated they would escalate and I should expect the escalation reply by last night. I am off work today so will try to contact by phone to see if I can get to the bottom of this.
Keith , this is typical error when the installer is unable to start installation process. There are different reasons like :
1) Conflicting background process or Windows services.
2) Corrupt Application Manager and its associated folder/ files which is unable to process installation.
3) User account specific issues may be permissions or sometimes security settings issue.
4)Media Database files corruption.
If the case has been escalated to senior level , I am pretty sure that the agent might have tried with all basic troubleshooting steps.
1) This includes, manually ending Adobe and Windows setup related processes from Windows Task Manager.
2) Deleting Adobe Application Manager and OOBE folder from C> Program Files(x86) > Common Files >Adobe and then Reinstalling and Updating Adobe Application Manager.
3) Selective Startup or trying with different / built in Hidden Admin account.
4) If you haven't installed any Adobe apps , you can try renaming Caps folder to Caps-old.
If the agent has performed all above steps, then it might be necessary to check with Error logs .
Also simply for confirmation once , try running System File Checker once .