Windows only: Login Recovery is a password retrieval application that requires physical access to the computer.
You burn Login Recovery to a CD as a bootable disc image, and after restarting the computer and booting into the disc image, Login Recovery will do its thing and write your encrypted username and password to a text file on the CD.
You then need to jump on a computer with internet access and upload the text file to Login Recovery’s website.
After 48 hours you can view the decrypted username and password for free, or you can pay about $40 to retrieve the information immediately.
You can also retrieve Windows passwords using Ophcrack for free, but if that doesn’t work out, and you’ve been pulling your hair out trying to get at a Windows account, give Login Recovery a try before scrapping the entire installation.

LoginRecovery.com