Here is the output from debugging my minidump:******************************************************************************** ** Bugcheck Analysis ** ******************************************************************************** DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1)An attempt was made to access a pageable (or completely invalid) address at aninterrupt request level (IRQL) that is too high. This is usuallycaused by drivers using improper addresses.If kernel debugger is available get stack backtrace.Arguments:Arg1: 0000000000000008, memory referencedArg2: 0000000000000002, IRQLArg3: 0000000000000001, value 0 = read operation, 1 = write operationArg4: fffff88001511673, address which referenced memory Debugging Details:------------------ WRITE_ADDRESS: GetPointerFromAddress: unable to read from fffff800030fb0e00000000000000008 CURRENT_IRQL: 2 FAULTING_IP: NETIO!WfppIncrementIndexAndPurgeEntries+93fffff880`01511673 48897008 mov qword ptr [rax+8],rsi CUSTOMER_CRASH_COUNT: 1 DEFAULT_BUCKET_ID: VISTA_DRIVER_FAULT BUGCHECK_STR: 0xD1 PROCESS_NAME: System TRAP_FRAME: fffff8800335b980 -- (.trap 0xfffff8800335b980)NOTE: The trap frame does not contain all registers.Some register values may be zeroed or incorrect.rax=0000000000000000 rbx=0000000000000000 rcx=fffffa80089b4f50rdx=0000000000000034 rsi=0000000000000000 rdi=0000000000000000rip=fffff88001511673 rsp=fffff8800335bb10 rbp=fffffa80089b4f48r8=fffff8800335bb58 r9=0000000000000000 r10=0000000000000000r11=000000000000000a r12=0000000000000000 r13=0000000000000000r14=0000000000000000 r15=0000000000000000iopl=0 nv up ei pl nz na po ncNETIO!WfppIncrementIndexAndPurgeEntries+0x93:fffff880`01511673 48897008 mov qword ptr [rax+8],rsi ds:00000000`00000008=????????????????Resetting default scope LAST_CONTROL_TRANSFER: from fffff80002ec4469 to fffff80002ec4f00 STACK_TEXT: fffff880`0335b838 fffff800`02ec4469 : 00000000`0000000a 00000000`00000008 00000000`00000002 00000000`00000001 : nt!KeBugCheckExfffff880`0335b840 fffff800`02ec30e0 : fffffa80`089b9508 fffff880`0177a180 fffffa80`075444e0 fffffa80`0861aa5c : nt!KiBugCheckDispatch+0x69fffff880`0335b980 fffff880`01511673 : fffff880`0177a180 fffff880`0177a910 fffff880`0177a180 fffff880`0177a910 : nt!KiPageFault+0x260fffff880`0335bb10 fffff880`01511799 : 00000000`00000004 fffff880`0177a1c0 fffff880`0177a910 fffff880`0177a180 : NETIO!WfppIncrementIndexAndPurgeEntries+0x93fffff880`0335bb80 fffff880`0151127f : fffff880`0177a5d0 fffffa80`0553d680 fffff880`0177a1c0 00000000`00000000 : NETIO!WfppLeastRecentlyUsedTimerRoutine+0x19fffff880`0335bbd0 fffff880`0151198e : 00000001`000000ff 00000000`00000000 fffff880`0177a840 fffffa80`0553d680 : NETIO!WfpTimerWheelTimeoutHandler+0xfffffff880`0335bc50 fffff800`031be527 : fffffa80`06435040 fffffa80`0845ca40 fffffa80`0845ca40 fffffa80`0553d680 : NETIO!WfpSysTimerPassiveCallback+0x2efffff880`0335bc80 fffff800`02ed2161 : fffff800`03068500 fffff800`031be504 fffffa80`0553d680 00000000`00000000 : nt!IopProcessWorkItem+0x23fffff880`0335bcb0 fffff800`03168166 : 00330031`00440041 fffffa80`0553d680 00000000`00000080 fffffa80`0551f040 : nt!ExpWorkerThread+0x111fffff880`0335bd40 fffff800`02ea3486 : fffff880`0316a180 fffffa80`0553d680 fffff880`031750c0 00370045`0038002d : nt!PspSystemThreadStartup+0x5afffff880`0335bd80 00000000`00000000 : fffff880`0335c000 fffff880`03356000 fffff880`0335b9f0 00000000`00000000 : nt!KxStartSystemThread+0x16 STACK_COMMAND: kb FOLLOWUP_IP: NETIO!WfppIncrementIndexAndPurgeEntries+93fffff880`01511673 48897008 mov qword ptr [rax+8],rsi SYMBOL_STACK_INDEX: 3 SYMBOL_NAME: NETIO!WfppIncrementIndexAndPurgeEntries+93 FOLLOWUP_NAME: MachineOwner MODULE_NAME: NETIO IMAGE_NAME: NETIO.SYS DEBUG_FLR_IMAGE_TIMESTAMP: 4a5bc18a FAILURE_BUCKET_ID: X64_0xD1_NETIO!WfppIncrementIndexAndPurgeEntries+93 BUCKET_ID: X64_0xD1_NETIO!WfppIncrementIndexAndPurgeEntries+93 Followup: MachineOwner--------- I have gotten this bugcheck 14 times since 28-Sep-09. Any ideas....;-)?

Can you zip up the minidump files and make available via Windows Live SkyDrive or similar site?

I will work on that. Do you have the URL for Windows Live Skydrive? FWIW they are pretty much all alike as far as content goes. Same bugcheck and debug.

It's a good sign if the content is consistent as that is more indicative of a driver problem rather than hardware.Here's a link on using Windows Live Skydrive:http://social.technet.microsoft.com/Forums/en/w7itproui/thread/4fc10639-02db-4665-993a-08d865088d65

Here is is right here.http://cid-2befa8f18b576878.skydrive.live.com/self.aspx/.Public/netio%5E_sys%5E_bsod%5E_windows7.zip

OK, if you look at the IRQL_NOT_LESS_OR_EQUAL Stop Errors it appears the mfewfpk.sys is accessing and possibly corrupting memory prior to the tcpip.sys and the netio.sys. The mfewfpk.sys is "bolded":STACK_TEXT: fffff880`033694c8 fffff800`02e7c469 : 00000000`0000000a 00000000`00000000 00000000`00000002 00000000`00000001 : nt!KeBugCheckExfffff880`033694d0 fffff800`02e7b0e0 : 00000000`00000010 00000000`00000000 00000000`0000000b fffffa80`0661e0a8 : nt!KiBugCheckDispatch+0x69fffff880`03369610 fffff800`02e86d4f : 00000000`00000003 00000000`00000000 00000000`00000003 00000000`00000000 : nt!KiPageFault+0x260fffff880`033697a0 fffff880`0142b557 : fffffa80`0661d080 fffff880`03369a80 00000000`00006c07 fffff880`014f13de : nt!KeAcquireInStackQueuedSpinLockAtDpcLevel+0x4ffffff880`033697f0 fffff880`016e47bd : fffffa80`0b12f350 00000000`00000017 fffffa80`05aa4010 fffff880`03369a80 : NETIO!WfpExpireEntryLru+0x17fffff880`03369840 fffff880`016a2d26 : 00000000`00000004 fffff880`00c00032 fffffa80`0735e3b0 fffff880`00000001 : tcpip!WfpAleCloseRemoteEndpointConnection+0x2dfffff880`03369870 fffff880`017245bb : fffffa80`0b12f350 fffffa80`0585593a fffffa80`09bafc20 fffffa80`0b12f350 : tcpip! ?? ::FNODOBFM::`string'+0x22592fffff880`033699c0 fffff880`01724942 : 00000000`00000000 fffffa80`05855870 fffffa80`064f4c80 fffffa80`09bafc20 : tcpip!WfpAleHandleSendCompletion+0xebfffff880`03369ae0 fffff880`0172eac2 : fffffa80`0552cb60 fffff880`02fd5180 fffffa80`0552cc20 00000000`00000000 : tcpip!WfpAlepAuthorizeSendCompletion+0x32fffff880`03369b30 fffff880`01490af2 : fffff880`03369c10 00120006`000b07d9 fffffa80`064f6990 fffffa80`09bafc20 : tcpip!WfpAleCompleteOperation+0x162fffff880`03369bd0 fffff880`011bc9c5 : fffffa80`064f6990 fffff880`011cf840 fffffa80`09bafc20 00000000`00000037 : fwpkclnt!FwpsCompleteOperation0+0x1efffff880`03369c00 fffffa80`064f6990 : fffff880`011cf840 fffffa80`09bafc20 00000000`00000037 00000000`000007ff : mfewfpk+0x99c5fffff880`03369c08 fffff880`011cf840 : fffffa80`09bafc20 00000000`00000037 00000000`000007ff 00000000`00000050 : 0xfffffa80`064f6990fffff880`03369c10 fffffa80`09bafc20 : 00000000`00000037 00000000`000007ff 00000000`00000050 00000000`00000000 : mfewfpk+0x1c840fffff880`03369c18 00000000`00000037 : 00000000`000007ff 00000000`00000050 00000000`00000000 fffff800`00000000 : 0xfffffa80`09bafc20fffff880`03369c20 00000000`000007ff : 00000000`00000050 00000000`00000000 fffff800`00000000 fffff800`02e3b0dc : 0x37fffff880`03369c28 00000000`00000050 : 00000000`00000000 fffff800`00000000 fffff800`02e3b0dc 00000000`00000000 : 0x7fffffff880`03369c30 00000000`00000000 : fffff800`00000000 fffff800`02e3b0dc 00000000`00000000 00000000`00060000 : 0x50So, it appears that the mfewfpk.sys may bethe actual driver causing the crashes rather than the netio.sys.The mfewfpk.sysappears to be a driver for McAfee Total Protection.I would suggest to uninstall the McAfeesoftware and see if the problem resolves.BTW, are you running a beta version of McAfee?

I have been running a beta version of McAfee that was part of Windows 7 recommended before the official release. I dumped that version tonightand got the final version that Comcast provides. I also did some work with "Verifier" to checkdrivers that are loaded and not Microsoft. I got a coupleof bugcheck errors when testing against one driver ATKDispLowFilter.sys.I updated my version of ASUS SmartDoctor for control of my videocards. I reset my "Verifier" settings and will see what happens with the changes I made. Thanks much for you input. BTW I am only using the virusscan part of McAfeeto reduce that footprint. If I see the netio.sys error return I will test against all of the loaded McAfee files with the default and/or custom "Verifier" setttingsto see if anything gives with them.