I have repeated BSODs, but unfortunately my system doesn't seem to write minidump/kernel dumps!! I don't know why, because everything is set to! However, on one of the three or so crashes I got in a day I did get a dump write, and analyzing it with windbg I found that it was probably a driver called ntkrnlpa.exe, whatever that is. Because I only have that one dump I cannot tell if that was the primary and consistent cause, or even if it was accurate, but I have included the bang analyze dash v and lmv results for this debug, if anyone can add any wisdom to this irritating problem. Thanks, Scarlet (the lmv results extend much farther, but I only included the info relevant to the driver hinted by !analyze -v...) -- kd> !analyze -v ******************************************************************************* * * * Bugcheck Analysis * * * ******************************************************************************* 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: 71a5df52, memory referenced Arg2: 00000002, IRQL Arg3: 00000008, value 0 = read operation, 1 = write operation Arg4: 71a5df52, address which referenced memory Debugging Details: ------------------ READ_ADDRESS: 71a5df52 CURRENT_IRQL: 2 FAULTING_IP: +71a5df52 71a5df52 ?? ??? CUSTOMER_CRASH_COUNT: 1 DEFAULT_BUCKET_ID: DRIVER_FAULT BUGCHECK_STR: 0xD1 LAST_CONTROL_TRANSFER: from 71a5df52 to 8053fa73 FAILED_INSTRUCTION_ADDRESS: +71a5df52 71a5df52 ?? ??? STACK_TEXT: ed767d64 71a5df52 badb0d00 7c90eb94 ed767d98 nt!KiTrap0E+0x233 WARNING: Frame IP not in any known module. Following frames may be wrong. 0093f158 00000000 00000000 00000000 00000000 0x71a5df52 STACK_COMMAND: kb FOLLOWUP_IP: nt!KiTrap0E+233 8053fa73 f7457000000200 test dword ptr [ebp+70h],20000h SYMBOL_STACK_INDEX: 0 SYMBOL_NAME: nt!KiTrap0E+233 FOLLOWUP_NAME: MachineOwner MODULE_NAME: nt IMAGE_NAME: ntkrnlpa.exe DEBUG_FLR_IMAGE_TIMESTAMP: 45e53f9c FAILURE_BUCKET_ID: 0xD1_CODE_AV_BAD_IP_nt!KiTrap0E+233 BUCKET_ID: 0xD1_CODE_AV_BAD_IP_nt!KiTrap0E+233 Followup: MachineOwner --------- kd> lmv start end module name 804d7000 806cd580 nt # (pdb symbols) c:\symbols\ntkrnlpa.pdb\F612363DB38C423CB08559DDBCA9F2F71\ntkrnlpa.pdb Loaded symbol image file: ntkrnlpa.exe Mapped memory image file: c:\symbols\ntkrnlpa.exe\45E53F9C1f6580\ntkrnlpa.exe Image path: ntkrnlpa.exe Image name: ntkrnlpa.exe Timestamp: Wed Feb 28 00:38:52 2007 (45E53F9C) CheckSum: 00200031 ImageSize: 001F6580 File version: 5.1.2600.3093 Product version: 5.1.2600.3093 File flags: 0 (Mask 3F) File OS: 40004 NT Win32 File type: 1.0 App File date: 00000000.00000000 Translations: 0411.04b0 CompanyName: Microsoft Corporation ProductName: Microsoft(R) Windows(R) Operating System InternalName: ntkrnlpa.exe OriginalFilename: ntkrnlpa.exe ProductVersion: 5.1.2600.3093 FileVersion: 5.1.2600.3093 (xpsp_sp2_gdr.070227-2254) FileDescription: NT Kernel & System LegalCopyright: (C) Microsoft Corporation. All rights reserved.