All: I know this has been discussed before and I stumbled across this issue and fix but cannot find it this time. My Windows 7 Pro laptop is on a Win2k3 Domain with Group Policy enforced. One specific GPO will lock a workstation if it is idle for 15 minutes. I recall there being a NetBIOS registry key that had to be changed to fix this issue of BSOD but cannot find it. If you know of it, please share! vDebugging Details: ------------------ EXCEPTION_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%08lx referenced memory at 0x%08lx. The memory could not be %s. FAULTING_IP: win32k!MulConvertChildRedirectionDfbSurfaceToDib+38 97c8c2e8 f6404c01 test byte ptr [eax+4Ch],1 TRAP_FRAME: 996178fc -- (.trap 0xffffffff996178fc) ErrCode = 00000000 eax=fffffff0 ebx=00000000 ecx=99617940 edx=00000001 esi=fe8df380 edi=fdc33c90 eip=97c8c2e8 esp=99617970 ebp=99617980 iopl=0 nv up ei ng nz na pe nc cs=0008 ss=0010 ds=0023 es=0023 fs=0030 gs=0000 efl=00010286 win32k!MulConvertChildRedirectionDfbSurfaceToDib+0x38: 97c8c2e8 f6404c01 test byte ptr [eax+4Ch],1 ds:0023:0000003c=?? Resetting default scope CUSTOMER_CRASH_COUNT: 1 DEFAULT_BUCKET_ID: VISTA_DRIVER_FAULT BUGCHECK_STR: 0x8E PROCESS_NAME: MTri1+.exe CURRENT_IRQL: 0 LAST_CONTROL_TRANSFER: from 97bd1114 to 97c8c2e8 STACK_TEXT: 99617980 97bd1114 00000001 04050293 8676aba0 win32k!MulConvertChildRedirectionDfbSurfaceToDib+0x38 99617994 97bd0930 fe4707c8 00000000 ffa6a008 win32k!pConvertDfbSurfaceToDib+0x36 996179c0 97bd3b3d ffa6a008 fe4aa5b0 00000000 win32k!bDynamicRemoveAllDriverRealizations+0x49 99617a24 97afa4bc ffa6a008 fdc32008 00000001 win32k!bDynamicModeChange+0x97 99617b10 97af9152 00000000 894730a8 00000000 win32k!DrvInternalChangeDisplaySettings+0xb04 99617c2c 97bd9997 0012f80c ffb80008 002cf8a0 win32k!DrvChangeDisplaySettings+0x3ae 99617c88 97bda293 0012f80c 002cf8a0 894970e0 win32k!xxxInternalUserChangeDisplaySettings+0x247 99617cf8 97bd9def 0012f80c 002cf8a0 00000000 win32k!xxxUserChangeDisplaySettings+0x67 99617d1c 8285a44a 0012f80c 002cf8a0 00000000 win32k!NtUserChangeDisplaySettings+0x60 99617d1c 778864f4 0012f80c 002cf8a0 00000000 nt!KiFastCallEntry+0x12a WARNING: Frame IP not in any known module. Following frames may be wrong. 0012f814 00000000 00000000 00000000 00000000 0x778864f4 STACK_COMMAND: kb FOLLOWUP_IP: win32k!MulConvertChildRedirectionDfbSurfaceToDib+38 97c8c2e8 f6404c01 test byte ptr [eax+4Ch],1 SYMBOL_STACK_INDEX: 0 SYMBOL_NAME: win32k!MulConvertChildRedirectionDfbSurfaceToDib+38 FOLLOWUP_NAME: MachineOwner MODULE_NAME: win32k IMAGE_NAME: win32k.sys DEBUG_FLR_IMAGE_TIMESTAMP: 4bdc3f5e FAILURE_BUCKET_ID: 0x8E_win32k!MulConvertChildRedirectionDfbSurfaceToDib+38 BUCKET_ID: 0x8E_win32k!MulConvertChildRedirectionDfbSurfaceToDib+38 Followup: MachineOwner ---------

Hi, You encounter the Bug Check 0x8E error. For detailed about this Bug Check string, please read: Bug Check 0x8E: KERNEL_MODE_EXCEPTION_NOT_HANDLED You can try the methods listed in above link. However, if the issue persists, it is recommended to contact Microsoft Customer Support Service (CSS) for debugging the source file. Best Regards DalePlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.