Latest Windows updates no longer allows Adobe Pro to register with any account.
Error: "Your browser or operating system is no longer supported. You may need to install the latest updates to your operating system."
Fix:
New installers located here: U:\IT Applications\Adobe\Adobe Fix
Extract ACCCx5_5_0_617 and install and then sign into CC using IT adobe account.
Extract Acrobat_2017_Web_WWMUI and install using serial. Registration should then be skipped completely.