BSOD while doing random things on PC ntoskrnl.exe+6f880

Please follow Blue Screen of Death (BSOD) Posting Instructions to grab all and upload a report here.

Uninstall your installed version of the display driver.

• How-To Uninstall AMD Catalyst Drivers From A Windows Based System

Then clean up any possible leftover.

• Drivers - Clean Left over Files after Uninstalling

Then install version 13.9 WHQL only.

• Previous AMD Catalyst? Display Drivers

Let us know the result.
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Code:

*** WARNING: Unable to verify timestamp for atikmdag.sys
*** ERROR: Module load completed but symbols could not be loaded for atikmdag.sys
*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

Use !analyze -v to get detailed debugging information.

BugCheck A0000001, {5, 0, 0, 0}

Probably caused by : atikmdag.sys ( atikmdag+28ece )

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

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

Unknown bugcheck code (a0000001)
Unknown bugcheck description
Arguments:
Arg1: 0000000000000005
Arg2: 0000000000000000
Arg3: 0000000000000000
Arg4: 0000000000000000

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


CUSTOMER_CRASH_COUNT:  1

DEFAULT_BUCKET_ID:  WIN7_DRIVER_FAULT

BUGCHECK_STR:  0xA0000001

PROCESS_NAME:  System

CURRENT_IRQL:  a

ANALYSIS_VERSION: 6.3.9600.16384 (debuggers(dbg).130821-1623) amd64fre

LAST_CONTROL_TRANSFER:  from fffff8800f488ece to fffff80002ecebc0

STACK_TEXT:  
fffff880`009db6b8 fffff880`0f488ece : 00000000`a0000001 00000000`00000005 00000000`00000000 00000000`00000000 : nt!KeBugCheckEx
fffff880`009db6c0 00000000`a0000001 : 00000000`00000005 00000000`00000000 00000000`00000000 00000000`00000000 : atikmdag+0x28ece
fffff880`009db6c8 00000000`00000005 : 00000000`00000000 00000000`00000000 00000000`00000000 fffffa80`0b0ba7a0 : 0xa0000001
fffff880`009db6d0 00000000`00000000 : 00000000`00000000 00000000`00000000 fffffa80`0b0ba7a0 00000000`00000000 : 0x5


STACK_COMMAND:  kb

FOLLOWUP_IP: 
atikmdag+28ece
fffff880`0f488ece ??              ???

SYMBOL_STACK_INDEX:  1

SYMBOL_NAME:  atikmdag+28ece

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: atikmdag

IMAGE_NAME:  atikmdag.sys

DEBUG_FLR_IMAGE_TIMESTAMP:  53508a3c

FAILURE_BUCKET_ID:  X64_0xA0000001_atikmdag+28ece

BUCKET_ID:  X64_0xA0000001_atikmdag+28ece

ANALYSIS_SOURCE:  KM

FAILURE_ID_HASH_STRING:  km:x64_0xa0000001_atikmdag+28ece

FAILURE_ID_HASH:  {fe9ca8bf-417e-7edf-c2ea-22e52071137a}

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

4: kd> lmvm atikmdag
start             end                 module name
fffff880`0f460000 fffff880`10370000   atikmdag T (no symbols)           
    Loaded symbol image file: atikmdag.sys
    Image path: atikmdag.sys
    Image name: atikmdag.sys
    Timestamp:        Fri Apr 18 07:43:16 2014 (53508A3C)
    CheckSum:         00EAEEE6
    ImageSize:        00F10000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

What you have said is very true. Recently we are seeing this issue too repetitively. AMD used to code brilliant drivers and 13.9 WHQL is one of those.