Cannot register re-installed CS6, but registered successfully previously

Worked successfully with Adobe Master CS6, am a registered user.

• Dynamic Link with Encore suddenly messsage "Error loading transcode preset Internal/Blu-ray PAL 1440x1080i H.264".
• Re-installed Encore, problem exacerbated: Dynamic Link from Premiere to Encore grayed out, but would miraculously occasionally be active again.
• Uninstalled CS6, restarted Windows 7, installed Master CS6 again. had to supply code and register again, software could not connect to internet.
• Tried all the trics published on internet, to no avail, no way to generate request code for off-line registration.
• Uninstalled Master CS6, restarted Windows 7, applied Creative Cloud Cleaner, installed Master CS6: cannot register because internet connection not working.
• Adobe Create Cloud link: same problem, no internet connection.
• All other applications have access to the internet, so I am dumbfounded and desperate after trying full time for 3 days to resolve this.

Please help