I do not recall setting up a WordPress account. When I tried to comment on a WordPress blog, after entering my email address, a long, random string of characters was automatically entered as my username. I replaced it with my standard username, and guessed at a password. It was rejected, so I opted to have my password emailed to me. The email I then received from WordPress once again gave my username as that same long string of random characters. When I logged on using the link provided, and a newly changed password, I went into my profile, and tried to change username. I was denied.
Is it possible my email was fraudulently used to set up a fake WordPress account? How do I get my email disassociated from such an account, in order to set up my own real account using my personal username and password, and make it accessible only to me?