Open Regedit and go to the following, keys will be different depending on what product you are using:
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Adobe\Acrobat Reader\<vers.>\FeatureLockDown
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Adobe\Adobe Acrobat\<vers.>\FeatureLockDown
The registry entry called: bUpdater and it is a DWORD value. By simply setting the value to 0, the updates will be disabled. Setting it to 1 will enable updates. This registry entry does not exist by default, so it has to be created.
Disclaimer
This information is intended for general information purposes only and to assist customers in understanding system functionality. It should not be construed as legal advice or opinion on any specific facts or circumstances. You are advised to consult your own compliance staff or attorney regarding your specific questions or situation to ensure your compliance with company policies & procedures, applicable laws, and regulations.