Windows Live Mail users often report seeing an error popup with a yellow exclamation mark and an error message inside it in a corner of their screen whenever they login to Windows Live Mail. The error message inside the popup contains error code 0x800CCC79. While a small popup error message appearing in a corner of your screen and then disappearing after a while may not be a big deal and doesn’t affect Windows Live Mail functionality, seeing it every single time you login to Windows Live Mail (and, in some cases, even when you log off) can prove to be quite irritating.
In this context, error code 0x800CCC79 points toward an issue with a previously sent message, with the message in question still sitting in the affected user’s Outbox and giving birth to this issue. That being the case, all you need to do in order to get rid of the annoying error message popup is to remove the offending message from your Outbox, and all will be well again. In order to remove the offending message from your Outbox, you need to:
- Launch Windows Live Mail and login.
- Click on File > Work Offline to put Windows Live Mail into Offline
- Navigate to your Outbox.
- Locate the offending message within your Outbox (there should only be one, and this message will have been in your Outbox for the entire time you have been experiencing this issue), and delete
- Click on File > Work Offline once again to take Windows Live Mail out of Offline
- Restart your computer.
When the computer boots up, launch Windows Live Messenger, login and see whether or not the problem has been resolved. If the fix was successful, you will not see the error message popup when you login this time.