Software - Pantallazo azul

Bueno tengo un problema con mi ordenador, cada dos por tres se me reinicia, y me sale un pantallazo azul que pone volcado de memoria fisica.

He usado el programa winDbg y me sale esto

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* Bugcheck Analysis *
* *
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DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1)
An attempt was made to access a pageable (or completely invalid) address at an
interrupt request level (IRQL) that is too high. This is usually
caused by drivers using improper addresses.
If kernel debugger is available get stack backtrace.
Arguments:
Arg1: 00000009, memory referenced
Arg2: 00000002, IRQL
Arg3: 00000001, value 0 = read operation, 1 = write operation
Arg4: f8a0dabb, address which referenced memory

Debugging Details:
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ANALYSIS: Kernel with unknown size. Will force reload symbols with known size.
ANALYSIS: Force reload command: .reload /f ntoskrnl.exe=FFFFFFFF804D4000,1F2700,3D6DE35C
***** Kernel symbols are WRONG. Please fix symbols to do analysis.

***** Kernel symbols are WRONG. Please fix symbols to do analysis.

MODULE_NAME: usbohci

FAULTING_MODULE: 804d4000 nt

DEBUG_FLR_IMAGE_TIMESTAMP: 3f04cf82

WRITE_ADDRESS: unable to get nt!MmSpecialPoolStart
unable to get nt!MmSpecialPoolEnd
unable to get nt!MmPoolCodeStart
unable to get nt!MmPoolCodeEnd
00000009

CURRENT_IRQL: 2

FAULTING_IP:
usbohci+abb
f8a0dabb ?? ???

CUSTOMER_CRASH_COUNT: 2

DEFAULT_BUCKET_ID: WRONG_SYMBOLS

BUGCHECK_STR: 0xD1

LAST_CONTROL_TRANSFER: from 00000000 to 805266db

STACK_TEXT:
f8954e0c 00000000 00000009 00000002 00000001 nt+0x526db

STACK_COMMAND: .bugcheck ; kb

FOLLOWUP_IP:
usbohci+abb
f8a0dabb ?? ???

FOLLOWUP_NAME: MachineOwner

IMAGE_NAME: usbohci.sys

SYMBOL_NAME: usbohci+abb

BUCKET_ID: WRONG_SYMBOLS

Followup: MachineOwner
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A ver si me podéis ayudar. Muchas gracias