You can refer to below link and get the information :
If that doesn't help , You can reach out to Customer Service,. The details are given in the above Link.
If you've still got the computer with ADE on it, run ADE and look under Library/Authorize Computer, it will tell you the user id.
You should be able to get a new password on the Adobe web site https://www.adobe.com/cfusion/membership/index.cfm?loc=en_us&nf=1&form=pwd