Hi Lynne,
Unfortunately at the moment there are three known issues with the Windows Live Essentials Mail update
KB3093594
The first update was offered last year and after reports of issues, Microsoft re-released KB3093594 on December 17, 2015 (This was to address the known issue at the time).
Unfortunately a further issue arose and as of 1 February 2016 the re-released update was withdrawn.
Microsoft are aware and are working on resolving the bugs.
You can keep an eye on the official site for this issue:
https://support.microsoft.com/en-us/kb/3093594
There Microsoft will periodically release news on their progress; although I suspect they will seek volunteers to trial any new patch before making a full access release available.
There is also an unofficial site monitoring progress on this issue located within the Microsoft Community, located here:
http://answers.microsoft.com/en-us/...2/03dcc533-6e6b-429a-93aa-3aacddd208c9?auth=1
I am using Windows Live Essentials 2011 on my Windows 10 and have no issues at all with it. If you have the installation file for that from your old computer it may be worth your while uninstalling Windows Live Essentials Mail 2012, then installing the 2011 edition instead.
Note! I'm not sure about the licensing on this particular product so before doing that it would pay to contact Microsoft to check this is OK to do.
Other moderators or guests on this site may know too; so keep an eye on this thread for other posts.
If I become aware of a fix to your issue I'll update on this thread.
Regards,
Regedit32