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Possible Duplicate:
How can I log in into my not-registered SO account ?

I asked a question that I'm trying to respond to now. I asked that before I registered with this account. Now how can I edit the question or respond to, etc?

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migrated from stackoverflow.com Apr 12 '11 at 3:40

This question came from our site for professional and enthusiast programmers.

marked as duplicate by Michael Mrozek, YOU, Greg Hewgill, waiwai933, fretje Apr 12 '11 at 7:21

This question was marked as an exact duplicate of an existing question.

    
Probably this is your other account - stackoverflow.com/users/702838/ryan-cooper – YOU Apr 12 '11 at 5:01

Unregistered users are tracked by a long living browser cookie. So if you don't change PC/browser, don't trash cookies on browser shutdown, don't reinstall the OS and visit the site regularly, then you will be able to use the same account forever without the need to register your user account.

However, registering the account has the benefit that you will be able to login using the same account from everywhere in the world. If you register an account and leave a mail at team@stackoverflow.com with a link to your original unregistered account, then they will merge it for you and you will be able to gain access to your original posts again.

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Actually, it is possible to restore an unregistered account's cookie if you provide SE with your email address. – waiwai933 Apr 12 '11 at 5:15
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this answer should be edited, per @wai 's (correct) comment – Jeff Atwood Apr 12 '11 at 6:45