Windows 10 Windows 10 File Explorer Crashes Upon Right-Click-File > Send To > Mail Recipient

[LonnieBest]

Windows 10's explorer is crashing on:

Right-Click file > Send To > Mail Recipient


Here's the application error:


<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="2017-10-04T11:40:02.739012900Z" />
<EventRecordID>3694</EventRecordID>
<Channel>Application</Channel>
<Computer>pc777.lucky7.local</Computer>
<Security />
</System>
<EventData>
<Data>explorer.exe</Data>
<Data>10.0.15063.608</Data>
<Data>b00723ab</Data>
<Data>ntdll.dll</Data>
<Data>10.0.15063.608</Data>
<Data>8274fd8b</Data>
<Data>c0000409</Data>
<Data>000000000009626f</Data>
<Data>1404</Data>
<Data>01d33d0542be8faf</Data>
<Data>C:\WINDOWS\explorer.exe</Data>
<Data>C:\WINDOWS\SYSTEM32\ntdll.dll</Data>
<Data>a071ec0e-a54b-4141-814b-82b016c07833</Data>
<Data />
<Data />
</EventData>
</Event>


Things to note:

1. On this workstation, both Windows 10 and Office 2016 are fully updated.
2. It does this not matter what the Default Application for Email is (Mail, Outlook, and Thunderbird, have been set as default during testing --still crashes).
3. The "Mail Recipient.MAPIMail" file on this workstation is identical to "Mail Recipient.MAPIMail" files on other workstations where this feature is working correctly.
4. The registry at "Computer\HKEY_CLASSES_ROOT\mailto\shell\open\command" on this workstation is identical to other workstations where this feature is working.
5. Each day, additional users are reporting this same issue. It seems like Windows 10 Auto-Updates are breaking this feature one workstation at a time as the auto-updates are getting auto-applied. It seems like the users who never reboot their computer are the ones not experiencing this issue (YET).

Things I've tried:

• partnersupport.microsoft.com
• outlook-tips.net

Background:


A couple of months ago I upgraded one of my user's Windows 10 workstation from Office 2010 Home and Business 32bit to Office Home and Business 2016 64bit. This Mail Recipient feature worked for a long while, then it started crashing Explorer around Thursday of last week.



Expected Behavior:


This user mails a lot of file attachments from Windows File Explorer, by:

1. Right-Clicking on one or more files she has highlighted in Internet Explorer.
2. Then goes to the sub-menu "Send To" and then clicks "Mail Recipient"

After this, she expect these things to happen:

1. Outlook 2016 should compose a new email
2. The new email will have all the attachments attached (that she highlighted earlier).
3. The subject line of the new email should contain the list of file attachments that are attached to the email.

I appreciate any additional suggestions not included in the links above.

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