Windows 7: random bsod or freezes

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*                        Bugcheck Analysis                                    *
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Use !analyze -v to get detailed debugging information.

BugCheck 1000007F, {8, 801dd000, 0, 0}

Probably caused by : memory_corruption

Followup: memory_corruption
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0: kd> !analyze -v
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*                        Bugcheck Analysis                                    *
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UNEXPECTED_KERNEL_MODE_TRAP_M (1000007f)
This means a trap occurred in kernel mode, and it's a trap of a kind
that the kernel isn't allowed to have/catch (bound trap) or that
is always instant death (double fault).  The first number in the
bugcheck params is the number of the trap (8 = double fault, etc)
Consult an Intel x86 family manual to learn more about what these
traps are. Here is a *portion* of those codes:
If kv shows a taskGate
        use .tss on the part before the colon, then kv.
Else if kv shows a trapframe
        use .trap on that value
Else
        .trap on the appropriate frame will show where the trap was taken
        (on x86, this will be the ebp that goes with the procedure KiTrap)
Endif
kb will then show the corrected stack.
Arguments:
Arg1: 00000008, EXCEPTION_DOUBLE_FAULT
Arg2: 801dd000
Arg3: 00000000
Arg4: 00000000

Debugging Details:
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BUGCHECK_STR:  0x7f_8

CUSTOMER_CRASH_COUNT:  1

DEFAULT_BUCKET_ID:  CODE_CORRUPTION

PROCESS_NAME:  YahooMessenger

CURRENT_IRQL:  0

LAST_CONTROL_TRANSFER:  from 00000000 to 82cc8652

STACK_TEXT:  
8079d6a0 00000000 00000007 00000000 00000000 nt!KiSwapThread+0x25b


STACK_COMMAND:  kb

CHKIMG_EXTENSION: !chkimg -lo 50 -d !nt
    82cc8d80-82cc8d83  4 bytes - nt!KiServiceTable+24
	[ c2 f7 f4 82:08 c7 a4 90 ]
    82cc8da8-82cc8dab  4 bytes - nt!KiServiceTable+4c (+0x28)
	[ cc 4b e7 82:c8 77 f7 91 ]
    82cc8e08-82cc8e0b  4 bytes - nt!KiServiceTable+ac (+0x60)
	[ ca 9f e4 82:1c d1 a4 90 ]
    82cc8e5c-82cc8e63  8 bytes - nt!KiServiceTable+100 (+0x54)
	[ ef b7 e8 82 d0 54 f5 82:28 7f a5 90 74 7f a5 90 ]
    82cc8e68-82cc8e6b  4 bytes - nt!KiServiceTable+10c (+0x0c)
	[ 75 58 ea 82:f6 80 a5 90 ]
    82cc8e84-82cc8e87  4 bytes - nt!KiServiceTable+128 (+0x1c)
	[ 8e b2 e5 82:96 7e a5 90 ]
    82cc8eac-82cc8eb3  8 bytes - nt!KiServiceTable+150 (+0x28)
	[ 4d e0 e6 82 85 0a e5 82:ba 7b f7 91 de 7e a5 90 ]
    82cc8eb8-82cc8ec3  12 bytes - nt!KiServiceTable+15c (+0x0c)
	[ d6 6e f2 82 4b b3 eb 82:10 d3 a4 90 98 d4 a4 90 ]
    82cc8edc-82cc8edf  4 bytes - nt!KiServiceTable+180 (+0x24)
	[ b0 8d ef 82:9c da a4 90 ]
    82cc8eec-82cc8eef  4 bytes - nt!KiServiceTable+190 (+0x10)
	[ f3 f7 f4 82:56 c7 a4 90 ]
    82cc8f68-82cc8f6b  4 bytes - nt!KiServiceTable+20c (+0x7c)
	[ 7a 44 d0 82:ac 78 f7 91 ]
    82cc8fc8-82cc8fcb  4 bytes - nt!KiServiceTable+26c (+0x60)
	[ fc 0b e1 82:be c3 a4 90 ]
64 errors : !nt (82cc8d80-82cc8fcb)

MODULE_NAME: memory_corruption

IMAGE_NAME:  memory_corruption

FOLLOWUP_NAME:  memory_corruption

DEBUG_FLR_IMAGE_TIMESTAMP:  0

MEMORY_CORRUPTOR:  LARGE

FAILURE_BUCKET_ID:  MEMORY_CORRUPTION_LARGE

BUCKET_ID:  MEMORY_CORRUPTION_LARGE

Followup: memory_corruption
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