1) If you know your account's email address, and you can receive email there:

Enter the email address below, and click OK. You will be sent email instructions for resetting your password.

2) If you forgot your account's email address, or you can't receive email there:

• Go to the BOINC data directory on your computer (on Windows this is usually C:\Documents and Settings\All Users\Application Data\BOINC or C:\Program Files\BOINC.
• Find your account file for this project; it will have a name like account_lhcathome.cern.ch.xml (where the project URL is http://lhcathome.cern.ch).
• Open the file in a text editor like Notepad. You'll see something like

  <account>
      <master_url>http://lhcathome.cern.ch/</master_url>
      <authenticator>8b8496fdd26df7dc0423ecd43c09a56b</authenticator>
      <project_name>lhcathome</project_name>
      ...
  </account>
  

• Select and Copy the string between <authenticator> and </authenticator> (8b8496fdd26df7dc0423ecd43c09a56b in the above example).
• Paste the string into the field below, and click OK.
• You will now be logged in to your account; update the email and password of your account.