Server 2012 RDS disconnects - The Desktop Window Manager has exited with code (0xd00002fe)

We have users who are getting random disconnects from their RDS sessions and the timings correspond to the below event logs. This hasn't always been the case and has only been happening the past couple of weeks. any ideas why?
We have replaced the router, changed it to a different broadband connection entirely and are still getting this issue so seems to be software related. It is probably useful to know that the actual server/hardware doesn't lose connection at all and I can stay connected onto via remote software such as log me in whilst people get disconnected from RDS.

The Desktop Window Manager has exited with code (0xd00002fe)

Details of event log;
- System

  - Provider

   [ Name]  Desktop Window Manager
  - EventID 9009

   [ Qualifiers]  16384
   Level 4
   Task 0
   Keywords 0x80000000000000
  - TimeCreated

   [ SystemTime]  2014-07-24T10:33:05.000000000Z
   EventRecordID 23808
   Channel Application
   Computer ********.local

- EventData

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purpleoakConnect With a Mentor Author Commented:
the issue was resolved in a windows update.
That error means you closed RDP client. There is no problem at all.
purpleoakAuthor Commented:
Thank you for assisting. whilst i appreciate this error might just mean the RDP client is closed, that is part of the problem. they get random disconnects from RDS whilst the servers connectivity remains fine as well as the end clients broadband connection isn't dropping. This is the only event we can see around the time they get disconnected. Any further suggestions would be highly appreciated.
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How your network porblems relate to DWM? It handles disconnects properly like everywhere....
Your network/firewall admins should trace rest.
purpleoakAuthor Commented:
I don't know how it relates. hence me asking the question here and as I don't know what the problem is, all i know is we get random disconnects from the RDS and this is the only event log that coincides.
You need to get packet trace from one client with ms network monitor or wireshark and check with your networkfirewall admin about who is at fault.
purpleoakAuthor Commented:
i will try this tomorrow and see how it goes. thanks again.
Dont post packet dumps here, try first in house solutions.
You see - asking colleagues around helps ;)
purpleoakAuthor Commented:
fixed our self via windows update.
I have a Windows 2008 environment which has no issues at all. I am trying to migrate to 2012. I setup a new server with 2012 R2 and Remote Desktop Services enabled. I have licenses for RDS and the license diagnostic all shows checks. Yet when I try to connect with a regular user, it starts the Welcome User and then closes. If I try as admin, it does the same but before closing actually shows a box Access is denied. In both instances I always get an information log in application

The Desktop Window Manager has exited with code (0xd00002fe)

Any ideas?

Thomas BraunCommented:
"the issue was resolved in a windows update. "... would have been nice to tell which windows update resolved the problem...
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