![Diane Poremsky [Outlook MVP]](http://www.outlook-tips.net/images/2014/MVP_BlueOnly.png)
We're seeing a few errors from Outlook users after upgrading to Windows 10, specifically a message reporting problems sending messages. The affected users receive error 0x800CCC13. 'Task 'email address alias@domain.com- Sending' Cannot connect to the network. Verify your network connection or modem.'.
Reinstalling or repairing the Office install, making new profiles and other common troubleshooting steps will not fix this issue.
Microsoft is looking into it, but one fix we know works is to open a command prompt as an administrator and run sfc /scannow.
To use the System File Checker:
- Right click on the Start button and select Command Prompt (Admin)
- Type (or paste) sfc /scannow in the Command Prompt window then press Enter to begin scanning.
- Once System File Checker is finished, reboot the computer
Users are reporting that System File Checker reports corruption in mlang.dlI.Mui and Windows.Media.Speech.UXRes.dll.mui. SFC replaces the files and after a reboot, Outlook works again.
Published July 31, 2015. Last reviewed on July 31, 2015.
great fix it worked straight after thanks
what a good fix!! took a while and slightly scary but has done the trick and sorted what was looking like a nightmare
MY OUTLOOK 10 IS NOT WORKING AFTER UPGRADE THE WINDOWS 10
Any error messages? Is it not working at all or only send and receive affected?
When I try to do this, it gives me the error 'You must be an administrator running a console session in order to use the sfc utility' but I am the administrator (there's only one account on the machine), how do I start a console session, whatever that is?
I spent hours trying to find out why Outlook 2013 wouldn't send new messages after installation of Windows 10. Messages remained stuck in my Outbox. Running your suggested download quickly solved the problem. Thank you very much.