Whoa, I can kinda see why. The driver is pre-Windows 7 RTM, dated back from May 22, 2009. I'm not sure why you have a driver so old on this system for your graphics (did you install from a cd?) but it should be updated pronto.
The problem specifically is that the ATI driver was handling an event object incorrectly. The object name is Overdrive, which no doubt refers to ATI's Overdrive software that is used to overclock a system. I advise against using ATI Overdrive, since all overclocking should start and hopefully end inside the system's BIOS. Software overclocking can be very unstable, especially if it's with a driver and application this old. If you must monitor your GPU for temp/voltage/load, use a 3rd party application like HwInfo. If you must OC your GPU, do so through the BIOS if possible.
Analysts:
The crash for this kernel dump was quite clear in that a driver (atikmdag.sys; ATI driver) tried to reference a user handle as Kernel mode. Details on this check and why it's important as well as some fundamentals behind kernel/user objects and proper handling is explained in
this powerpoint. I can clarify to the best of my ability upon request, but the general idea is that references to an object is done differently depending on the object, and if something references an object as a kernel object when it's actually a user object, it opens a can of worms (security hole, data integrity compromise, etc.).
Code:
0: kd> !analyze -v
*******************************************************************************
* *
* Bugcheck Analysis *
* *
*******************************************************************************
DRIVER_VERIFIER_DETECTED_VIOLATION (c4)
A device driver attempting to corrupt the system has been caught. This is
because the driver was specified in the registry as being suspect (by the
administrator) and the kernel has enabled substantial checking of this driver.
If the driver attempts to corrupt the system, bugchecks 0xC4, 0xC1 and 0xA will
be among the most commonly seen crashes.
Arguments:
Arg1: 00000000000000f6, Referencing user handle as KernelMode.
Arg2: 00000000000004b8, Handle value being referenced.
Arg3: fffffa8005a844b0, Address of the current process.
Arg4: fffff8800487fc29, Address inside the driver that is performing the incorrect reference.
Debugging Details:
------------------
TRIAGER: Could not open triage file : C:\Program Files (x86)\Windows Kits\8.0\Debuggers\x64\triage\modclass.ini, error 2
BUGCHECK_STR: 0xc4_f6
DEFAULT_BUCKET_ID: WIN7_DRIVER_FAULT
PROCESS_NAME: CCC.exe
CURRENT_IRQL: 0
LAST_CONTROL_TRANSFER: from fffff800035613dc to fffff800030dafc0
STACK_TEXT:
fffff880`0759e268 fffff800`035613dc : 00000000`000000c4 00000000`000000f6 00000000`000004b8 fffffa80`05a844b0 : nt!KeBugCheckEx
fffff880`0759e270 fffff800`03576ae4 : 00000000`000004b8 fffffa80`05a844b0 00000000`00000002 fffffa80`04443b50 : nt!VerifierBugCheckIfAppropriate+0x3c
fffff880`0759e2b0 fffff800`0332e000 : 00000000`80000000 fffff880`0759e4e0 00000000`00000000 00000000`00000000 : nt!VfCheckUserHandle+0x1b4
fffff880`0759e390 fffff800`033b0ed5 : fffffa80`04443b00 000007fe`000f001f 00000000`00000000 0053002b`002b0000 : nt! ?? ::NNGAKEGL::`string'+0x212de
fffff880`0759e460 fffff800`03576878 : 00000202`0018002b fffff880`07596001 fffff980`0139ece0 fffff980`14b9eee0 : nt!ObReferenceObjectByHandle+0x25
fffff880`0759e4b0 fffff880`0487fc29 : fffff880`0759ea54 fffffa80`04445000 00000000`00000000 00000000`1cfdb510 : nt!VerifierObReferenceObjectByHandle+0x48
fffff880`0759e500 fffff880`048685a7 : fffff980`0164aea0 00000000`00000000 fffff880`0759e770 00000000`00000000 : atikmdag+0x31c29
fffff880`0759e540 fffff880`04860e98 : 00000000`00000000 00000000`00000000 fffff980`01610f80 fffff880`0759ea40 : atikmdag+0x1a5a7
fffff880`0759e730 fffff880`048613f3 : fffff880`0759e950 fffff880`044860d1 00000000`00000001 fffff880`0759e9c0 : atikmdag+0x12e98
fffff880`0759e7f0 fffff880`044b9f50 : 00000000`00000000 00000000`00000000 fffff880`0759e950 fffff8a0`0005d000 : atikmdag+0x133f3
fffff880`0759e840 fffff880`044ad093 : 00000000`00000000 00000000`00000000 fffff880`0759eca0 00000000`00000003 : dxgkrnl!DXGADAPTER::DdiEscape+0x50
fffff880`0759e870 fffff960`001a0ad2 : fffff8a0`00022000 fffffa80`04443b50 00000000`1cfdb510 00000000`00000020 : dxgkrnl!DxgkEscape+0x7af
fffff880`0759ebf0 fffff800`030da253 : 00000000`1cd05e10 fffff880`0759eca0 000007fe`ff490000 00000000`000000c0 : win32k!NtGdiDdDDIEscape+0x12
fffff880`0759ec20 000007fe`ff4913ea : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!KiSystemServiceCopyEnd+0x13
00000000`1b7acd38 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : 0x7fe`ff4913ea
STACK_COMMAND: kb
FOLLOWUP_IP:
atikmdag+31c29
fffff880`0487fc29 85c0 test eax,eax
SYMBOL_STACK_INDEX: 6
SYMBOL_NAME: atikmdag+31c29
FOLLOWUP_NAME: MachineOwner
MODULE_NAME: atikmdag
IMAGE_NAME: atikmdag.sys
DEBUG_FLR_IMAGE_TIMESTAMP: 4a1625b3
FAILURE_BUCKET_ID: X64_0xc4_f6_VRF_atikmdag+31c29
BUCKET_ID: X64_0xc4_f6_VRF_atikmdag+31c29
Followup: MachineOwner
---------
0: kd> lmvm atikmdag
start end module name
fffff880`0484e000 fffff880`04dbe000 atikmdag (no symbols)
Loaded symbol image file: atikmdag.sys
Image path: \SystemRoot\system32\DRIVERS\atikmdag.sys
Image name: atikmdag.sys
Timestamp: Fri May 22 00:10:27 2009 (4A1625B3)
CheckSum: 005261B1
ImageSize: 00570000
File version: 8.1.1.882
Product version: 8.1.1.882
File flags: 8 (Mask 3F) Private
File OS: 40004 NT Win32
File type: 3.4 Driver
File date: 00000000.00000000
Translations: 0409.04b0
CompanyName: ATI Technologies Inc.
ProductName: ATI Radeon Family
InternalName: atikmdag.sys
OriginalFilename: atikmdag.sys
ProductVersion: 8.01.01.882
FileVersion: 8.01.01.882
FileDescription: ATI Radeon Kernel Mode Driver
LegalCopyright: Copyright (C) 1998-2006 ATI Technologies Inc.
0: kd> !handle 4b8
PROCESS fffffa8005a844b0
SessionId: 1 Cid: 1044 Peb: 7fffffda000 ParentCid: 0e1c
DirBase: a15a3000 ObjectTable: fffff8a003399d00 HandleCount: 317.
Image: CCC.exe
Handle table at fffff8a003399d00 with 317 entries in use
04b8: Object: fffffa8003848300 GrantedAccess: 001f0003 Entry: fffff8a0036782e0
Object: fffffa8003848300 Type: (fffffa8002365a40) Event
ObjectHeader: fffffa80038482d0 (new version)
HandleCount: 1 PointerCount: 3
Directory Object: fffff8a0011e3490 Name: Overdrive