blue screen of death

Your BSOD's were caused by outdated ATI drivers..

Code:

Microsoft (R) Windows Debugger Version 6.2.9200.20512 AMD64
Copyright (c) Microsoft Corporation. All rights reserved.


Loading Dump File [C:\Users\Yusra\Downloads\ANDREW-NHI-Wed_04_09_2014_215912_57\040814-44725-01.dmp]
Mini Kernel Dump File: Only registers and stack trace are available

Symbol search path is: SRV*C:\SymCache*http://msdl.microsoft.com/download/symbols
Executable search path is: 
Windows 7 Kernel Version 7601 (Service Pack 1) MP (6 procs) Free x64
Product: WinNt, suite: TerminalServer SingleUserTS
Built by: 7601.18247.amd64fre.win7sp1_gdr.130828-1532
Machine Name:
Kernel base = 0xfffff800`02e1a000 PsLoadedModuleList = 0xfffff800`0305d6d0
Debug session time: Tue Apr  8 13:32:41.518 2014 (UTC + 6:00)
System Uptime: 0 days 4:49:57.438
Loading Kernel Symbols
...............................................................
................................................................
....................................
Loading User Symbols
Loading unloaded module list
......
*** WARNING: Unable to verify timestamp for dxgkrnl.sys
*** ERROR: Module load completed but symbols could not be loaded for dxgkrnl.sys
*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

Use !analyze -v to get detailed debugging information.

BugCheck 116, {fffffa8007942010, fffff88004900384, ffffffffc0000001, 3}

*** WARNING: Unable to verify timestamp for atikmpag.sys
*** ERROR: Module load completed but symbols could not be loaded for atikmpag.sys
Probably caused by : atikmpag.sys ( atikmpag+7384 )

Followup: MachineOwner
---------

1: kd> !analyze -v
*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

VIDEO_TDR_FAILURE (116)
Attempt to reset the display driver and recover from timeout failed.
Arguments:
Arg1: fffffa8007942010, Optional pointer to internal TDR recovery context (TDR_RECOVERY_CONTEXT).
Arg2: fffff88004900384, The pointer into responsible device driver module (e.g. owner tag).
Arg3: ffffffffc0000001, Optional error code (NTSTATUS) of the last failed operation.
Arg4: 0000000000000003, Optional internal context dependent data.

Debugging Details:
------------------


FAULTING_IP: 
atikmpag+7384
fffff880`04900384 4883ec28        sub     rsp,28h

DEFAULT_BUCKET_ID:  GRAPHICS_DRIVER_TDR_FAULT

CUSTOMER_CRASH_COUNT:  1

BUGCHECK_STR:  0x116

PROCESS_NAME:  System

CURRENT_IRQL:  0

STACK_TEXT:  
fffff880`02156988 fffff880`056e6140 : 00000000`00000116 fffffa80`07942010 fffff880`04900384 ffffffff`c0000001 : nt!KeBugCheckEx
fffff880`02156990 00000000`00000116 : fffffa80`07942010 fffff880`04900384 ffffffff`c0000001 00000000`00000003 : dxgkrnl+0x5d140
fffff880`02156998 fffffa80`07942010 : fffff880`04900384 ffffffff`c0000001 00000000`00000003 00000000`00000000 : 0x116
fffff880`021569a0 fffff880`04900384 : ffffffff`c0000001 00000000`00000003 00000000`00000000 fffffa80`07942010 : 0xfffffa80`07942010
fffff880`021569a8 ffffffff`c0000001 : 00000000`00000003 00000000`00000000 fffffa80`07942010 fffff880`056b9569 : atikmpag+0x7384
fffff880`021569b0 00000000`00000003 : 00000000`00000000 fffffa80`07942010 fffff880`056b9569 fffff880`04900384 : 0xffffffff`c0000001
fffff880`021569b8 00000000`00000000 : fffffa80`07942010 fffff880`056b9569 fffff880`04900384 fffffa80`0a1b7000 : 0x3


STACK_COMMAND:  kb

FOLLOWUP_IP: 
atikmpag+7384
fffff880`04900384 4883ec28        sub     rsp,28h

SYMBOL_STACK_INDEX:  4

SYMBOL_NAME:  atikmpag+7384

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: atikmpag

IMAGE_NAME:  atikmpag.sys

DEBUG_FLR_IMAGE_TIMESTAMP:  4dae3558

FAILURE_BUCKET_ID:  X64_0x116_IMAGE_atikmpag.sys

BUCKET_ID:  X64_0x116_IMAGE_atikmpag.sys

Followup: MachineOwner
---------

1: kd> lmvm atikmpag
start             end                 module name
fffff880`048f9000 fffff880`04949000   atikmpag T (no symbols)           
    Loaded symbol image file: atikmpag.sys
    Image path: \SystemRoot\system32\DRIVERS\atikmpag.sys
    Image name: atikmpag.sys
    Timestamp:        Wed Apr 20 07:22:32 2011 (4DAE3558)
    CheckSum:         00050398
    ImageSize:        00050000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

Perform a clean install of a driver following: How to Clean Left Over Driver Files with Driver Sweeper

Download Drivers

You can follow this thread for details. Its particularly for the error code from your dump. : STOP 0x116: VIDEO_TDR_ERROR troubleshooting

I'd also suggest you remove Tuneup Utilities if you don't use it.

Use Revo Uninstaller to uninstall stubborn software. Opt for Advance Mode while uninstalling which allows leftover registry removal:Download Revo Uninstaller Freeware - Free and Full Download - Uninstall software, remove programs, solve uninstall problems
Please run these tests and report back the results.

1. SFC /scannow to check windows for corruption - SFC /SCANNOW - System File Checker
2. Disk check for errors on the hard drive - Run Disk Check in Windows 7
3. Troubleshoot apps by a clean boot - Performing a Clean Startup
4. Memtest86+ paying attention to part 3 - RAM - Test with Memtest86+
5. Hard drive test from HDD mfg website - Hard Drive Diagnostic Procedure

You're welcome.
Please post for further problems.