Windows Live Messenger is the chat and data information exchange client that the Microsoft Corporation produced. An error that Windows Live Messenger users may encounter when signing in is Error 810030d. When the error occurs, it is normally due to either an Operating System (OS) or other third party program updates issue.

How to Fix Error 8100030d

Step 1 – Visit the Microsoft Live Messenger download page (download.live.com) to determine if the latest version is installed on the computer. Not having the latest version is known to cause Error 8100030d. Download and install the most current version of Live Messenger.

Step 2 – If the error persists when sign-in is attempted, make all hidden system and OS files visible and then clear the cache files for Live Messenger.

How to Display Hidden Files in Windows XP

Step 1 – Select “Start” and “My Computer.”

Step 2 – Choose “Tools” and “Folder Options” under “File Menu.”

Step 3 – Click “Advanced Settings” under “View” and check the check box beside “Show Hidden Files and Folders.” Clear the “Hide protected operating system files” and “Hide file extensions for known file types” check boxes.

Step 4 – Click “OK” then close the program window.

How to Display Hidden Files in Windows Vista

Step 1 – Click “My Computer.”

Step 2 – Choose “Organize” in the Explorer window, then choose “Folder and Search Options.”

Step 3 – Choose “View,” “Show Hidden Files and Folders,” then click “Ok.”

How to Delete Windows Live Contact Folders

After displaying the hidden OS files, delete Windows Live contact folders for Live Messenger.

Step 1 – Open “My Computer” and then browse to one of these locations depending on the computer’s OS:

Windows Vista – C:Users<Windows Logon name>App DataLocalMicrosoft).
Windows XP –  C:Documents and Settings<Windows logon name>Local SettingsApplication DataMicrosoft)

Step 2 – Delete the entire Windows Live Contact folder.

Step 3 – Sign into Windows Live Messenger and the error will be corrected.

How to Prevent AVG Antivirus from Causing Error 8100030d

The AVG 8.0 antivirus program is also known to cause error 8100030d. To ensure that AVG is configured to allow Live Messenger to work properly, take the following steps:

Step 1 – Double click the AVG program icon on the computer’s desktop to open the AVG user interface.

Step 2 – Double click the AVG Web Shield component icon and then turn on the Instant Messaging tab.

Step 3– Remove the check mark in the check box next to “Instant Messaging protection.”

Step 4 – Click “Save Changes” and restart the computer.