Remote Desktop Connection has stopped working

Question

Using Build 10041. Occurs on 2 separate systems I have when trying to use Remote Desktop Connection through a 2012 R2 RDS Gateway. I am able to connect to the remote systems and access the environment for a short period prior to MSTSC.EXE
crashing. "A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available."
Eventlog has the following:
Log Name:      Application
Source:        Application Error
Date:          3/25/2015 2:50:21 PM
Event ID:      1000
Task Category: (100)
Level:         Error
Keywords:      Classic
User:          N/A
Description:
Faulting application name: mstsc.exe, version: 10.0.10041.0, time stamp: 0x5503b1a7
Faulting module name: mstscax.dll, version: 10.0.10041.0, time stamp: 0x5503b315
Exception code: 0xc0000005
Fault offset: 0x000000000046d78c
Faulting process id: 0x2164
Faulting application start time: 0x01d06734abf028a0
Faulting application path: C:\WINDOWS\system32\mstsc.exe
Faulting module path: C:\WINDOWS\system32\mstscax.dll
Report Id: 2b084e37-d328-11e4-ab40-7c7a9191e005
Faulting package full name:
Faulting package-relative application ID:
JW

Answer 1

Tried this with no luck.  I have the same issue as the OP.  It was failing on 10041 and is still failing with an AV on 10049.  See below event log entry after registering mstscax.dll and rebooting.  Still failing.
Log Name:      Application
Source:        Application Error
Date:          4/11/2015 12:18:21
Event ID:      1000
Task Category: (100)
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      Chuck1
Description:
Faulting application name: mstsc.exe, version: 10.0.10049.0, time stamp: 0x55137bff
Faulting module name: mstscax.dll, version: 10.0.10049.0, time stamp: 0x55137d3f
Exception code: 0xc0000005
Fault offset: 0x000000000046d74c
Faulting process id: 0x1870
Faulting application start time: 0x01d0748c29e55e06
Faulting application path: C:\WINDOWS\system32\mstsc.exe
Faulting module path: C:\WINDOWS\system32\mstscax.dll
Report Id: 83921b7c-e07f-11e4-960f-40f02f7ad3a4
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="2015-04-11T19:18:21.000000000Z" />
    <EventRecordID>73626</EventRecordID>
    <Channel>Application</Channel>
    <Computer>Chuck1</Computer>
    <Security />
  </System>
  <EventData>
    <Data>mstsc.exe</Data>
    <Data>10.0.10049.0</Data>
    <Data>55137bff</Data>
    <Data>mstscax.dll</Data>
    <Data>10.0.10049.0</Data>
    <Data>55137d3f</Data>
    <Data>c0000005</Data>
    <Data>000000000046d74c</Data>
    <Data>1870</Data>
    <Data>01d0748c29e55e06</Data>
    <Data>C:\WINDOWS\system32\mstsc.exe</Data>
    <Data>C:\WINDOWS\system32\mstscax.dll</Data>
    <Data>83921b7c-e07f-11e4-960f-40f02f7ad3a4</Data>
    <Data>
    </Data>
    <Data>
    </Data>
  </EventData>
</Event>