Once again check if you have any adobe application installed, if you have remove it and then try the below steps :
Turn off User Account Control : http://helpx.adobe.com/x-productkb/global/disable-user-account-control-uac.html
Restart Windows in a modified mode | Windows 7, Vista - http://helpx.adobe.com/x-productkb/global/restart-windows-modified-mode-windows.html
Hope that Helps!
I do have other Adobe products installed (CS5.5 Master Collection, RoboHelp, Captivate, Lightroom, Presenter and Acrobat X) but I'm not about to uninstall them only to find out that when I reinstall them they won't work. So uninstalling them is a non-starter. I'd rather wait for CS7.
However, I uninstalled the CS6 Master Collection trial for the 5th time, ran the clean-up tool, followed the advice above, reboted, ran set-up as administrator and rebooted after the install only to find the same problem
Bottom line is that CS6ServiceManager.exe is not installing.
Any more advice would be appreciated.