Steps To Prevent Windows Error Code 80048821 Windows Live Messenger could not sign you in because the sign-in name you ...
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About the Error

When you try to sign in to Windows Live Messenger you receive this error message which prevents you from signing in to the service successfully.

Windows code 80048821 - Repair instruction

There are a number of different issues that can cause this error to occur. The best place to start is with your username and password. Double check to ensure you typed in the correct username and password.

If you have used the right username and password, check the time and date settings on your PC by double clicking on the time in the lower right hand corner of the desktop screen and then make the necessary adjustments if the settings are incorrect.

You can also try resetting your password by logging on to and changing your password to something else. Once you change your password, shut down Messenger and then restart it and try to sign in with your new password. .

If you are using a third party firewall such as ZoneAlarm it may be blocking the Messenger program from access to the Internet. In this case it may be necessary to add Windows Live Messenger to the list of allowed programs in the firewall list. You can also try disabling and then re-enabling the firewall application and then try to sign in to Messenger again. To ensure there is no problem with the firewall try uninstalling the firewall and resinstalling it again.

If you are still experiencing problems you can try to correct the error to change the settings in Internet Explorer. Open Internet Explorer and click on Tools on the main toolbar and then choose Internet Options from the drop down menu. Click on Connections and then choose Local Area Network settings. Remove the check mark from the box next to Use a proxy server for your LAN. When you are finished click on Advanced and then choose Security. Remove the check mark next to Check for server certificate revocation if a check mark is present in the box. Verify that Use SSL 2.0 and Use SSL 3.0 both have a check mark placed in the box and click OK. Try to sign in Windows Live Messenger again.

If you are still experiencing difficulty signing in to Messenger it may be necessary to re-register DLL files. You can do this by clicking on Start on the main toolbar and then choosing Run from the menu. When the command prompt opens enter regsvr32 softpub.dll and then press the Enter key. Repeat this procedure for each of the following files: regsvr32 wintrust.dll regsvr32 MSXML3.dll and regsvr32 initpki.dll and then try to sign in to Windows Live Messenger again.

To learn more about this error, please check out our Error Analyzer software.

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