mfmp4srcsnk.dll crashing when .MOV file is selected

I am running Windows 8.1 Pro fully patched (clean install of Windows 8, minimal patches to then upgrade to 8.1, then installed all updates).

Whenever I select a MOV (QuickTime Video) file explorer.exe crashes out and restarts, no message box is shown, just the below entry in Event Viewer. This happens both when browsing files and when using an Open File Control in applications.

I have tried:

• sfc /scannow
• Several Fix It's (sorry do not recall which ones)
• Installing VLC Media Player
• Installing K-Lite Codecs Pack Lite
• A lot of Google searches
• Moving the mov file to different Locations
• sample files from apples site - these can be selected fine
• including sample_iPod.m4v (same codecs) works, tried changing to a m4v extension still crashes
• Downloading the video from source again
• Playing/highlighting on other systems: Win Vista, Win 7, Linux, Mac, Android (MX Player), Synology NAS (via Photo Station) ... all works fine

This is the info that VLC can pull about the file:

• Model : iPhone 4S
• Software : 6.0.1
• Record Company : Apple

The video in question was taken on an iPhone 4S then e-mailed to me (over a year ago) and has worked on all systems I have watched it on, if I manage to hit enter quick enough then it plays fine. Unfortunately I do not know how to find another video taken on an iPhone 4S for comparison

But even if this is a slightly corrupt file it should not crash out explorer or any application which highlights that file, should it???

Any advice would be very welcome as I watch this video quite often. I cannot think of any other info to include but if you need anymore info let me know. 

Event Details

Log Name:      Application

Source:        Application Error

Date:          09/09/2014 18:41:55

Event ID:      1000

Task Category: (100)

Level:         Error

Keywords:      Classic

User:          N/A

Computer:      [removed]

Description:

Faulting application name: Explorer.EXE, version: 6.3.9600.17249, time stamp: 0x53e160b9

Faulting module name: mfmp4srcsnk.dll, version: 12.0.9600.17238, time stamp: 0x53d0c43e

Exception code: 0xc0000094

Fault offset: 0x000000000008ed0f

Faulting process ID: 0xfa0

Faulting application start time: 0x01cfcc55344567f7

Faulting application path: C:\WINDOWS\Explorer.EXE

Faulting module path: C:\WINDOWS\System32\mfmp4srcsnk.dll

Report ID: 96966394-3848-11e4-be71-6c71d9c2fc89

Faulting package full name: 

Faulting package-relative application ID: 

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="2014-09-09T17:41:55.000000000Z" />

    <EventRecordID>6608</EventRecordID>

    <Channel>Application</Channel>

    <Computer>[removed]</Computer>

    <Security />

  </System>

  <EventData>

    <Data>Explorer.EXE</Data>

    <Data>6.3.9600.17249</Data>

    <Data>53e160b9</Data>

    <Data>mfmp4srcsnk.dll</Data>

    <Data>12.0.9600.17238</Data>

    <Data>53d0c43e</Data>

    <Data>c0000094</Data>

    <Data>000000000008ed0f</Data>

    <Data>fa0</Data>

    <Data>01cfcc55344567f7</Data>

    <Data>C:\WINDOWS\Explorer.EXE</Data>

    <Data>C:\WINDOWS\System32\mfmp4srcsnk.dll</Data>

    <Data>96966394-3848-11e4-be71-6c71d9c2fc89</Data>

    <Data>

    </Data>

    <Data>

    </Data>

  </EventData>

</Event>