Hi there! My XP pro system crashes a couple of times a day. I Have analized the minidump files an they all are the same. I think it has to do with my AC'97 realtek audio. Cause in the minidumpfile (some of it printed below) i find the following: BugCheck D1, {f81cb7d0, 2, 0, f81cb7d0} ***** Kernel symbols are WRONG. Please fix symbols to do analysis. Unable to load image ALCXWDM.SYS, Win32 error 2 *** WARNING: Unable to verify timestamp for ALCXWDM.SYS *** ERROR: Module load completed but symbols could not be loaded for ALCXWDM.SYS Probably caused by : Unknown_Image ( ALCXWDM+4d7d0 ) Followup: MachineOwner ******** I know that ALCXWDM.SYS is a driver for the audio, and the audio drivers arent windows certified either so my guess is that's the problem. But there doesnt seem to be any realtek certified drivers. I have no idea what to about it. please help me, best regards Peter System: ,,,,,, p4 2.4 512 ram , ATi radeon 9800 pro motherboard: soltek SL-86SPE-L AC'97 audio chip Codec by Realteak.(6-channels) ****************************************************************************** * * * 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: f81cb7d0, memory referenced Arg2: 00000002, IRQL Arg3: 00000000, value 0 = read operation, 1 = write operation Arg4: f81cb7d0, address which referenced memory Debugging Details: ------------------ ***** Kernel symbols are WRONG. Please fix symbols to do analysis. READ_ADDRESS: unable to get nt!MmPoolCodeEnd unable to get nt!MmSpecialPoolEnd unable to get nt!MmPagedPoolEnd unable to get nt!MmNonPagedPoolEnd unable to get nt!MmNonPagedPoolStart unable to get nt!MmSpecialPoolStart unable to get nt!MmPagedPoolStart unable to get nt!MiSessionPoolStart unable to get nt!MiSessionPoolEnd unable to get nt!MmNonPagedPoolExpansionStart unable to get nt!MmPoolCodeStart f81cb7d0 CURRENT_IRQL: 2 FAULTING_IP: ALCXWDM+4d7d0 f81cb7d0 ?? ??? DEFAULT_BUCKET_ID: DRIVER_FAULT BUGCHECK_STR: 0xD1 LAST_CONTROL_TRANSFER: from 80530335 to 804f4103 STACK_TEXT: WARNING: Stack unwind information not available. Following frames may be wrong. f8952f30 80530335 0000000a f81cb7d0 00000002 nt+0x20103 f8952f4c 00000000 00000000 f81cac38 81ed8a64 nt+0x5c335 FAILED_INSTRUCTION_ADDRESS: ALCXWDM+4d7d0 f81cb7d0 ?? ??? FOLLOWUP_IP: ALCXWDM+4d7d0 f81cb7d0 ?? ??? FOLLOWUP_NAME: MachineOwner SYMBOL_NAME: ALCXWDM+4d7d0 IMAGE_NAME: Unknown_Image DEBUG_FLR_IMAGE_TIMESTAMP: 0 STACK_COMMAND: kb BUCKET_ID: WRONG_SYMBOLS MODULE_NAME: Unknown_Module Followup: MachineOwner ---------

Do u have any conflicts listed in Device Manager ?? If not, then u may find that simply re-seating/swapping/replacing ur RAM could solve the problem. GoodLuck

I have reseated my RAM and its seems to work fine know, it hasnīt crashed for a couple of hours,(knock on wood). Lets hope it stays that way.. otherwise I'll get back anyway: Thanks alot Keef444!