Lost email account, how to get in my bitlocker

Here is my problem I forgot to get my bitlocker information and my email
account is closed and on top of that I had a regisrty problem and
configuration problem. So, I saved most of what I needed to disk and
reinstalled windows Vista and would like my Ultimate purchase to get my
computer ba ck the way it was. How do I get into the locker since the
passsword will go to my account that has been disabled by Comcast.
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Thanks,
Joker