Win 2008 R2 keeps turning Off Automatically

Hi All,


I have test server which is holding Xenapp roles and it's Vm server hosted in VMWARE.
Since last week friday ,My server is being turned off automatically...
While analyzing the log i found the following events..can some please help me on this.

Also,am using a trail version of Win 2008 R2 server..


Events:

This is the showing repeatedly whenver the turn off occurs

Log Name:      System
Source:        USER32
Date:          11/11/2013 6:01:10 PM
Event ID:      1074
Task Category: None
Level:         Information
Keywords:      Classic
User:          SYSTEM
Computer:      TestXen.federated.fds
Description:
The process wininit.exe (127.0.0.1) has initiated the power off of computer TESTXEN on behalf of user NT AUTHORITY\SYSTEM for the following reason: Legacy API shutdown
 Reason Code: 0x80070000
 Shutdown Type: power off
 Comment:
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="USER32" />
    <EventID Qualifiers="32768">1074</EventID>
    <Level>4</Level>
    <Task>0</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2013-11-12T02:01:10.000000000Z" />
    <EventRecordID>6213</EventRecordID>
    <Channel>System</Channel>
    <Computer>TestXen.federated.fds</Computer>
    <Security UserID="S-1-5-18" />
  </System>
  <EventData>
    <Data>wininit.exe (127.0.0.1)</Data>
    <Data>TESTXEN</Data>
    <Data>Legacy API shutdown</Data>
    <Data>0x80070000</Data>
    <Data>power off</Data>
    <Data>
    </Data>
    <Data>NT AUTHORITY\SYSTEM</Data>
    <Binary>00000780000000000000000000000000000000000000000000000000000000000000000000000000</Binary>
  </EventData>
</Event>



Second :

Log Name:      System
Source:        Microsoft-Windows-Wininit
Date:          11/12/2013 9:44:56 AM
Event ID:      11
Task Category: None
Level:         Warning
Keywords:      
User:          SYSTEM
Computer:      TestXen.federated.fds
Description:
Custom dynamic link libraries are being loaded for every application. The system administrator should review the list of libraries to ensure they are related to trusted applications.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Microsoft-Windows-Wininit" Guid="{206F6DEA-D3C5-4D10-BC72-989F03C8B84B}" />
    <EventID>11</EventID>
    <Version>0</Version>
    <Level>3</Level>
    <Task>0</Task>
    <Opcode>0</Opcode>
    <Keywords>0x4000000000000000</Keywords>
    <TimeCreated SystemTime="2013-11-12T17:44:56.510040400Z" />
    <EventRecordID>6317</EventRecordID>
    <Correlation />
    <Execution ProcessID="756" ThreadID="812" />
    <Channel>System</Channel>
    <Computer>TestXen.federated.fds</Computer>
    <Security UserID="S-1-5-18" />
  </System>
  <EventData>
    <Data Name="StringCount">1</Data>
    <Data Name="String">C:\PROGRA~2\Citrix\System32\mfaphook64.dll</Data>
  </EventData>
</Event>