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We have received reports that the Windows Live Mail update- KB KB3093594, is causing stability issues for many of our customers running Windows Live Mail 2012.
Thank you for reporting this issue.
We have identified the root cause and are currently working on a fix that addresses the issue for impacted users on applicable platforms.
Please visit Update for Windows Live Essentials Mail 2012 or this thread for the latest updates.
***Update Dec 20^th^
Sorry for the delay in posting this update.
On Dec 17^th^we rereleased the Windows Live Mail update KB3093594. For users who had previously installed this update and were experiencing a crash when launching the Windows Live Mail app, please download and re-install KB3093594 and this issue should be resolved.
https://support.microsoft.com/kb/3093594
Some users have independently reported a separate issue with sync of mail with attachments that we continue to investigate.
Update 1 February 2016
(posted as Issues 3 under Known issues ... for KB3093594 rev. 6.0)
Some customers have reported other issues with the release on December 17, 2015. This update is no longer being offered while Microsoft investigates these issues further. Server interactions will remain supported during this investigation.
NB: links to http://www.microsoft.com/en-us/download/details.aspx?id=49486 will not work 
Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.
after the update i face 2 problems.
the most serious one is this
all new emails from contacts that have greek characters in their name, show up with special characters instead. for example instead of contact name Βαγγελης, i see @%^%#$@^&*
the second issue is that all sent emails have my name in the recepient....
hope these will be addressed and fixed. especially the first one is making me want to get rid of wlm. and i dont want to do that
I also have Win 8.1. Same thing happened to me. Also, my deleted items reappear in my inbox as unopened. My emails come in doubles and triples. Now they want me to download and install another patch to fix it but from reading some of the problems, looks like some are unable to access their WLM accounts after doing so. MICROSOFT please notify me when you have a real and tested remedy for this problem.
I did a complete uninstall of Windows Live Mail 2012 then reinstalled Windows Live Mail 2012. The program is now working properly. It appears the latest update KB3093594 is corrupted.
Was notified to install this update Version: 3093594 Date Published: 17/12/2015 this was to on the 11 December via email; held back from this because, updated to Windows 10 the Supported Operating System for this update excludes Windows 10, see below;
It seems unfair to write-off Windows Live Mail 2012 for Windows 10, and I am speaking for others as well that we have come to rely on this with all that it has to offer!
There is a slight problem with syncing sometimes; Microsoft/Outlook.com do I have to write-off WLM2012?
What about all my storage folder?
Was notified to install this update Version: 3093594 Date Published: 17/12/2015 this was to on the 11 December via email; held back from this because, updated to Windows 10 the Supported Operating System for this update excludes Windows 10, see below;
It seems unfair to write-off Windows Live Mail 2012 for Windows 10, and I am speak for others as well that we have come to rely on this with all that it has to offer!
There is a slight problem with syncing sometimes; Microsoft/Outlook.com do I have to write-off WLM2012?
What about all my storage folder?
Windows Live Mail 2012 works fine with Windows 10 as long as you DO NOT install the update KB3093594.
I installed the update and had to uninstall the complete program and re-install back to the last working edition and now I am back with a fully working WLM2012 version 16.4.3528.0331 as I was before installing the apparent bug ridden KB update.
If when they finish messing with the various Microsoft email addresses and they no longer integrate with WLM2012 I will stop using then and move to another email service who still retains the correct integration with WLM2012.
I have yet to find another email software that allows me to store all my emails from different addresses in a whole variety of off-line folders on my PC and then remove them from the web based servers, when I want.
I will not be using the integrated email within windows10 as it does not appear to have a quarter of the functions that WLM2012 has. When and if Microsoft finally understand that not all their users want to keep emails on their server and DO want to store some if not all off-line on a local PC and re-write the email program to allow that, they are going to find that users are going to keep on complaining and giving bad reports.
