If you are encountering the error code 80048823 when you sign onto Messenger, try the following:
1. Verify your sign-in credentials on the Windows Live ID website.
1.a. Visit
http://account.live.com .
1.b. Click Sign in with a different account.
1.c. Enter the Windows Live ID that you used with Messenger and the correct password.
1.d. Click Sign in.
1.e. You will be presented with a sequence of characters to enter. Enter the sequence correctly, and then click Sign in to unlock your account. Note: You will be presented with this only if your account is locked by multiple sign-in attempts.
2. If you are unsuccessful, try to reset the password. To do this, follow these steps:
2.a. Visit
http://account.live.com .
2.b. Click Sign in with a different account.
2.c. Enter the ID, and then click Forgot your password
2.d. Follow the steps in the wizard to reset your password.
2.e. If you need help resetting your password because you cannot remember your secret question and answer or alternate e-mail address, contact Windows Live ID support. To do this, visit the following Web site, and then select Windows Live ID:
http://support.live.com
2.f. After you successfully reset your password, go to the next step to update the settings.
3. If you are successfully signed in by using your account information, remove the saved credentials, and then reenter the updated credentials. To do this, follow these steps:
3.a. In the Messenger sign-in window, select your e-mail address from the E-mail address drop-down list. If you do not see your ID on the list, go to step c.
3.b. Click Forget Me, and then click Yes to confirm the deletion.
3.c. Type your e-mail address and your password.
3.d. Select the Remember Me and Remember my password check boxes to save your sign-in information, and then click Sign in.
4. If you receive the same error message again in Messenger, follow steps 1 to verify that your account has not been locked again. If the account is repeatedly being locked, contact Windows Live ID support for help regaining your account. To do this, visit the following Web site, and then select Windows Live ID:
http://support.live.com 
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