Hello,
you should have a look at Adobe's database, to see what's stored/saved about your accounts.
Here you will find general infos about your Adobe Account
https://www.adobe.com/account.html and there
http://helpx.adobe.com/x-productkb/global/find-serial-number.html.
What concerns to activate/deactivate please have a look there:
http://helpx.adobe.com/x-productkb/policy-pricing/activation-deactivation-products.html
If really necessary necessary and for further questions click throughhttp://helpx.adobe.com/contact.html and if "open" please use the chat, I had the best experiences. I quote from Adobe's employee Preran: The chat button is activated as soon as there is an agent available to help.
Hans-Günter