Windows 7: BSOD Playing DOTA II error 0x1000007e

......
*** WARNING: Unable to verify timestamp for lvrs64.sys
*** ERROR: Module load completed but symbols could not be loaded for lvrs64.sys
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Use !analyze -v to get detailed debugging information.

BugCheck 1000007E, {ffffffffc0000005, fffff8800933cf8a, fffff880033a2758, fffff880033a1fb0}

Probably caused by : lvrs64.sys ( lvrs64+2f8a )

Followup: MachineOwner
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3: kd> !analyze -v
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SYSTEM_THREAD_EXCEPTION_NOT_HANDLED_M (1000007e)
This is a very common bugcheck.  Usually the exception address pinpoints
the driver/function that caused the problem.  Always note this address
as well as the link date of the driver/image that contains this address.
Some common problems are exception code 0x80000003.  This means a hard
coded breakpoint or assertion was hit, but this system was booted
/NODEBUG.  This is not supposed to happen as developers should never have
hardcoded breakpoints in retail code, but ...
If this happens, make sure a debugger gets connected, and the
system is booted /DEBUG.  This will let us see why this breakpoint is
happening.
Arguments:
Arg1: ffffffffc0000005, The exception code that was not handled
Arg2: fffff8800933cf8a, The address that the exception occurred at
Arg3: fffff880033a2758, Exception Record Address
Arg4: fffff880033a1fb0, Context Record Address

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


EXCEPTION_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%08lx referenced memory at 0x%08lx. The memory could not be %s.

FAULTING_IP: 
lvrs64+2f8a
fffff880`0933cf8a 45396924        cmp     dword ptr [r9+24h],r13d

EXCEPTION_RECORD:  fffff880033a2758 -- (.exr 0xfffff880033a2758)
ExceptionAddress: fffff8800933cf8a (lvrs64+0x0000000000002f8a)
   ExceptionCode: c0000005 (Access violation)
  ExceptionFlags: 00000000
NumberParameters: 2
   Parameter[0]: 0000000000000000
   Parameter[1]: 000000000044e144
Attempt to read from address 000000000044e144

CONTEXT:  fffff880033a1fb0 -- (.cxr 0xfffff880033a1fb0)
rax=0000000000000000 rbx=fffffa80085ea920 rcx=0000000000000001
rdx=0000000000000000 rsi=0000000000000000 rdi=0000000000000000
rip=fffff8800933cf8a rsp=fffff880033a2990 rbp=000000000044e120
 r8=0000000000000000  r9=000000000044e120 r10=0000000000000002
r11=000000000044e120 r12=fffffa8009dc9d10 r13=0000000000000000
r14=000000000044e120 r15=000000000044e120
iopl=0         nv up ei pl zr na po nc
cs=0010  ss=0018  ds=002b  es=002b  fs=0053  gs=002b             efl=00010246
lvrs64+0x2f8a:
fffff880`0933cf8a 45396924        cmp     dword ptr [r9+24h],r13d ds:002b:00000000`0044e144=????????
Resetting default scope

CUSTOMER_CRASH_COUNT:  1

DEFAULT_BUCKET_ID:  WIN7_DRIVER_FAULT

PROCESS_NAME:  System

CURRENT_IRQL:  0

ERROR_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%08lx referenced memory at 0x%08lx. The memory could not be %s.

EXCEPTION_PARAMETER1:  0000000000000000

EXCEPTION_PARAMETER2:  000000000044e144

READ_ADDRESS: GetPointerFromAddress: unable to read from fffff8000f0fe100
GetUlongFromAddress: unable to read from fffff8000f0fe1c0
 000000000044e144 Nonpaged pool

FOLLOWUP_IP: 
lvrs64+2f8a
fffff880`0933cf8a 45396924        cmp     dword ptr [r9+24h],r13d

BUGCHECK_STR:  0x7E

LAST_CONTROL_TRANSFER:  from 0000000000000001 to fffff8800933cf8a

STACK_TEXT:  
fffff880`033a2990 00000000`00000001 : fffffa80`00000000 00000000`00000000 00000000`00000000 fffffa80`0c6830d0 : lvrs64+0x2f8a
fffff880`033a2998 fffffa80`00000000 : 00000000`00000000 00000000`00000000 fffffa80`0c6830d0 00000000`00000000 : 0x1
fffff880`033a29a0 00000000`00000000 : 00000000`00000000 fffffa80`0c6830d0 00000000`00000000 00000000`00000000 : 0xfffffa80`00000000


SYMBOL_STACK_INDEX:  0

SYMBOL_NAME:  lvrs64+2f8a

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: lvrs64

IMAGE_NAME:  lvrs64.sys

DEBUG_FLR_IMAGE_TIMESTAMP:  4f166964

STACK_COMMAND:  .cxr 0xfffff880033a1fb0 ; kb

FAILURE_BUCKET_ID:  X64_0x7E_lvrs64+2f8a

BUCKET_ID:  X64_0x7E_lvrs64+2f8a

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

3: kd> lmvm lvrs64
start             end                 module name
fffff880`0933a000 fffff880`0938da80   lvrs64   T (no symbols)           
    Loaded symbol image file: lvrs64.sys
    Image path: \SystemRoot\system32\DRIVERS\lvrs64.sys
    Image name: lvrs64.sys
    Timestamp:        Wed Jan 18 12:10:36 2012 (4F166964)
    CheckSum:         00061E9E
    ImageSize:        00053A80
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4