you will have to setup you windows live on your hotmail first
Occasionally, you may have to change or reset the password for your Windows Live ID to sign in to Zune.net or to access your Zune account.
To change or reset the password for your Windows Live ID, follow these steps:
Visit the following Web page, and then click Forgot Your Password?:
Type your Windows Live ID, type the characters that appear in the Picture box, and then click Continue.
Click Send yourself a password reset e-mail message.
Click Send Message.
On the confirmation page, click Done.
Sign in to your e-mail account, and then click the link in the e-mail message to reset your password.
On the Confirm your e-mail address page, type your e-mail address, and then click Continue.
Type your new password two times, and then click Continue.
If you want to enter an "alternate" e-mail address, type the address two times, and then click Continue.
If you do not want to enter an "alternate" e-mail address, click Skip.
When you receive the "You've changed your password" message, click Done.For more information about Windows Live ID services, visit the following Windows Live ID Web site: