Windows 7: random BSOD when I turn on the pc

Microsoft (R) Windows Debugger Version 6.11.0001.404 X86
Copyright (c) Microsoft Corporation. All rights reserved.


Loading Dump File [C:\Users\K\Desktop\Windows_NT6_BSOD_jcgriff2\051411-21996-01.dmp]
Mini Kernel Dump File: Only registers and stack trace are available

DbsSplayTreeRangeMap::Add: ignoring zero-sized range at ?ffffffff`82f77ad4?
Symbol search path is: SRV*C:\Symbols*http://msdl.microsoft.com/download/symbols;srv*e:\symbols
*http://msdl.microsoft.com/download/symbols
Executable search path is: 
Windows 7 Kernel Version 7601 (Service Pack 1) MP (4 procs) Free x86 compatible
Product: WinNt, suite: TerminalServer SingleUserTS
Built by: 7601.17592.x86fre.win7sp1_gdr.110408-1631
Machine Name:
Kernel base = 0x82e50000 PsLoadedModuleList = 0x82f994d0
Debug session time: Fri May 13 12:44:42.271 2011 (GMT-4)
System Uptime: 0 days 17:24:55.723
Loading Kernel Symbols
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Loading User Symbols
Loading unloaded module list
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0: kd> !analyze -v
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*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
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DRIVER_POWER_STATE_FAILURE (9f)
A driver is causing an inconsistent power state.
Arguments:
Arg1: 00000003, A device object has been blocking an Irp for too long a time
Arg2: 86440030, Physical Device Object of the stack
Arg3: 82f77ae0, Functional Device Object of the stack
Arg4: 88dc1810, The blocked IRP

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

*** WARNING: Unable to verify timestamp for NETwNs32.sys
*** ERROR: Module load completed but symbols could not be loaded for NETwNs32.sys

DRVPOWERSTATE_SUBCODE:  3

IRP_ADDRESS:  88dc1810

DEVICE_OBJECT: 88ed3028

DRIVER_OBJECT: 88ec8660

IMAGE_NAME:  NETwNs32.sys

DEBUG_FLR_IMAGE_TIMESTAMP:  4c3da298

MODULE_NAME: NETwNs32

FAULTING_MODULE: 99c03000 NETwNs32

CUSTOMER_CRASH_COUNT:  1

DEFAULT_BUCKET_ID:  VISTA_DRIVER_FAULT

BUGCHECK_STR:  0x9F

PROCESS_NAME:  System

CURRENT_IRQL:  2

LAST_CONTROL_TRANSFER:  from 82f16f35 to 82f2ef2c

STACK_TEXT:  
82f77a94 82f16f35 0000009f 00000003 86440030 nt!KeBugCheckEx+0x1e
82f77b00 82f16fae 82f77ba0 00000000 82f84380 nt!PopCheckIrpWatchdog+0x1f5
82f77b38 82eca039 82f926e0 00000000 0ec46e75 nt!PopCheckForIdleness+0x73
82f77b7c 82ec9fdd 82f7ad20 82f77ca8 00000002 nt!KiProcessTimerDpcTable+0x50
82f77c68 82ec9e9a 82f7ad20 82f77ca8 00000000 nt!KiProcessExpiredTimerList+0x101
82f77cdc 82ec800e 003d52f2 88d981a8 82f84380 nt!KiTimerExpiration+0x25c
82f77d20 82ec7e38 00000000 0000000e 00000000 nt!KiRetireDpcList+0xcb
82f77d24 00000000 0000000e 00000000 00000000 nt!KiIdleLoop+0x38


STACK_COMMAND:  kb

FOLLOWUP_NAME:  MachineOwner

FAILURE_BUCKET_ID:  0x9F_IMAGE_NETwNs32.sys

BUCKET_ID:  0x9F_IMAGE_NETwNs32.sys

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

0: kd> lmvm NETwNs32
start    end        module name
99c03000 9a28d000   NETwNs32 T (no symbols)           
    Loaded symbol image file: NETwNs32.sys
    Image path: \SystemRoot\system32\DRIVERS\NETwNs32.sys
    Image name: NETwNs32.sys
    Timestamp:        Wed Jul 14 07:42:16 2010 (4C3DA298)
    CheckSum:         00686E74
    ImageSize:        0068A000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4