in event viewer it shows following 

Log Name:      System
Source:        Microsoft-Windows-Kernel-Power
Date:          10/7/2014 2:23:57 AM
Event ID:      41
Task Category: (63)
Level:         Critical
Keywords:      (2)
User:          SYSTEM
Computer:      Lavish
Description:
The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Microsoft-Windows-Kernel-Power" Guid="{331C3B3A-2005-44C2-AC5E-77220C37D6B4}" />
    <EventID>41</EventID>
    <Version>3</Version>
    <Level>1</Level>
    <Task>63</Task>
    <Opcode>0</Opcode>
    <Keywords>0x8000000000000002</Keywords>
    <TimeCreated SystemTime="2014-10-07T09:23:57.628683600Z" />
    <EventRecordID>5698</EventRecordID>
    <Correlation />
    <Execution ProcessID="4" ThreadID="8" />
    <Channel>System</Channel>
    <Computer>Lavish</Computer>
    <Security UserID="S-1-5-18" />
  </System>
  <EventData>
    <Data Name="BugcheckCode">275</Data>
    <Data Name="BugcheckParameter1">0x17</Data>
    <Data Name="BugcheckParameter2">0xffffe001ec451010</Data>
    <Data Name="BugcheckParameter3">0x0</Data>
    <Data Name="BugcheckParameter4">0x0</Data>
    <Data Name="SleepInProgress">5</Data>
    <Data Name="PowerButtonTimestamp">0</Data>
    <Data Name="BootAppStatus">3221225473</Data>
  </EventData>
</Event>

please give solution

Hi

Does this happen when the machine goes into hibernation?

yes

and when i shut down with fast startup and start, it shows video dxgkrnl error

and also it restarts when awake from sleep