The easiest way to recover your password is to use a LiveCD operating system which allows you to see all the passwords stored for Windows 7 OS. For this operation I recommend using Ophcrack. You will need to download Vista/7 version of the LiveCD and burn it to an empty CD. You can do this with ImgBURN. Download and install ImgBURN and select Write Image file to Disc, then select Ophcrack ISO file. Once it completes, restart and boot from CD. When the system loads successfully, an application will start to decrypt the password file, retrieving all passwords that are found.