Starting several days ago, WLM 2012 (16.4.3528.0331) started crashing when sending/forwarding emails.  Not every time, maybe 10% of the time.  I've posted an Event Viewer entry at the end of this post.  This is on a Win7 Pro x64 desktop.  I am current with all MS critical updates EXCEPT the 1 that showed up first thing this morning.  With this WLM problem already present, I did not want to introduce another variable.

I looked back through the Event Viewer and found 4 occurrences:

09/15 - 1 10:00:14PM

09/23 - 1 7:07:38PM

09/24 - 2 10:37:39AM  2:23:04PM

After the 1st occurrence this morning, I went into Control Panel --> Uninstall or change a program --> Windows Essentials 2012 --> Repair all Windows Essentials programs.  It did not help.  Shortly after, I got the second error.

I have not installed any new programs or done any updates since before the first error on 09/15.

Here is the Event Viewer entry from the first error today, 09/24:

Log Name:      Application
Source:        Application Error
Date:          09/24/2014 10:37:39 AM
Event ID:      1000
Task Category: (100)
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      lenovoM83
Description:
Faulting application name: wlmail.exe, version: 16.4.3528.331, time stamp: 0x533a3fce
Faulting module name: MSMAIL.DLL, version: 16.4.3528.331, time stamp: 0x533a408a
Exception code: 0xc0000005
Fault offset: 0x0002f015
Faulting process id: 0x%9
Faulting application start time: 0x%10
Faulting application path: %11
Faulting module path: %12
Report Id: %13
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Application Error" />
    <EventID Qualifiers="0">1000</EventID>
    <Level>2</Level>
    <Task>100</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2014-09-24T14:37:39.000000000Z" />
    <EventRecordID>12835</EventRecordID>
    <Channel>Application</Channel>
    <Computer>lenovoM83</Computer>
    <Security />
  </System>
  <EventData>
    <Data>wlmail.exe</Data>
    <Data>16.4.3528.331</Data>
    <Data>533a3fce</Data>
    <Data>MSMAIL.DLL</Data>
    <Data>16.4.3528.331</Data>
    <Data>533a408a</Data>
    <Data>c0000005</Data>
    <Data>0002f015</Data>
  </EventData>
</Event>