I just analysed a DRIVER_IRQL_NOT_LESS_OR_EQUAL crash I've been getting lately using Dumpchk.exe and Pstat.exe. Here are the results: Filename . . . . . . .C:\WINDOWS\MEMORY.DMP Signature. . . . . . .PAGE ValidDump. . . . . . .DUMP MajorVersion . . . . .free system MinorVersion . . . . .2600 DirectoryTableBase . .0x00039000 PfnDataBase. . . . . .0x81a13000 PsLoadedModuleList . .0x8055ab20 PsActiveProcessHead. .0x80560bd8 MachineImageType . . .i386 NumberProcessors . . .1 BugCheckCode . . . . .0x000000d1 BugCheckParameter1 . .0xffffffeb BugCheckParameter2 . .0x00000005 BugCheckParameter3 . .0x00000000 BugCheckParameter4 . .0xffffffeb ExceptionCode. . . . .0x80000003 ExceptionFlags . . . .0x00000001 ExceptionAddress . . .0x804e2158 NumberOfRuns . . . . .0x3 NumberOfPages. . . . .0x2ff8d Run #1 BasePage . . . . . .0x1 PageCount. . . . . .0x9e Run #2 BasePage . . . . . .0x100 PageCount. . . . . .0xeff Run #3 BasePage . . . . . .0x1000 PageCount. . . . . .0x2eff0 PSTAT.EXE Info: ModuleName Load Addr Code Data Paged LinkDate -------------- ntoskrnl.exe 804d7000 478976 93440 1243264 Wed Aug 04 03:49:48 2004 hal.dll 806ec000 35456 42624 29952 Wed Aug 04 03:29:05 2004 KDCOM.DLL f7c6f000 2560 256 1280 Fri Aug 17 18:19:10 2001 BOOTVID.dll f7b7f000 5632 3584 0 Fri Aug 17 18:19:09 2001 imagesrv.sys f772f000 74368 17280 16512 Mon Feb 16 22:26:26 2004 ACPI.sys f7701000 110336 11008 41984 Wed Aug 04 03:37:35 2004 WMILIB.SYS f7c71000 512 0 1280 Fri Aug 17 18:37:23 2001 pci.sys f76f0000 16000 1664 34176 Wed Aug 04 03:37:45 2004 isapnp.sys f776f000 8704 768 18688 Fri Aug 17 18:28:01 2001 ohci1394.sys f777f000 40960 128 3712 Wed Aug 04 03:40:05 2004 1394BUS.SYS f778f000 31744 256 14208 Wed Aug 04 03:40:03 2004 compbatt.sys f7b83000 2560 0 2944 Fri Aug 17 18:27:58 2001 BATTC.SYS f7b87000 2432 128 3072 Fri Aug 17 18:27:52 2001 viaidexp.sys f7c73000 3456 0 0 Thu Oct 18 03:42:14 2001 PCIIDEX.SYS f79ef000 5504 512 13056 Wed Aug 04 03:29:40 2004 MountMgr.sys f779f000 1408 128 33664 Wed Aug 04 03:28:29 2004 ftdisk.sys f76d1000 5888 128 102400 Fri Aug 17 18:22:41 2001 dmload.sys f7c75000 2560 128 0 Fri Aug 17 18:28:15 2001 dmio.sys f76ab000 120960 15104 1280 Wed Aug 04 03:37:13 2004 PartMgr.sys f79f7000 1920 128 11136 Fri Aug 17 23:02:23 2001 VolSnap.sys f77af000 2560 128 35200 Wed Aug 04 03:30:14 2004 atapi.sys f7693000 44928 3584 29952 Wed Aug 04 03:29:41 2004 SCSIPORT.SYS f767b000 27648 768 50816 Wed Aug 04 03:29:39 2004 disk.sys f77bf000 8320 384 18048 Wed Aug 04 03:29:53 2004 CLASSPNP.SYS f77cf000 25472 128 15360 Wed Aug 04 03:44:26 2004 fltmgr.sys f765c000 31232 3200 60672 Wed Aug 04 03:31:17 2004 sr.sys f764a000 2048 1152 54784 Wed Aug 04 03:36:22 2004 PxHelp20.sys f79ff000 7936 7616 0 Tue Oct 28 14:55:49 2003 KSecDD.sys f7633000 10368 6912 64000 Wed Aug 04 03:29:45 2004 Ntfs.sys f75a6000 96000 7040 412544 Wed Aug 04 03:45:06 2004 NDIS.sys f7579000 22272 2688 131328 Wed Aug 04 03:44:27 2004 viaagp.sys f77df000 10368 256 24192 Wed Aug 04 03:37:42 2004 Mup.sys f755e000 14592 6272 72832 Wed Aug 04 03:45:20 2004 nic1394.sys f780f000 52096 640 0 Wed Aug 04 03:28:28 2004 amdk7.sys f794f000 9344 1408 11264 Wed Aug 04 03:29:19 2004 nv4_mini.sys f71dd000 1885344 752000 25568 Fri Oct 29 22:50:09 2004 VIDEOPRT.SYS f71c9000 11008 384 50048 Wed Aug 04 03:37:04 2004 ctaud2k.sys f7159000 187008 34720 213984 Fri Apr 11 01:02:34 2003 portcls.sys f7135000 44672 10496 65536 Wed Aug 04 03:45:47 2004 drmk.sys f795f000 5504 1280 47616 Wed Aug 04 03:37:54 2004 ks.sys f7112000 31872 128 87808 Wed Aug 04 03:45:20 2004 ctoss2k.sys f70e7000 86624 78336 1728 Tue Mar 25 06:42:52 2003 ctprxy2k.sys f7ca1000 1440 64 1632 Tue Mar 25 06:43:01 2003 gameenum.sys f7c63000 1280 128 5376 Wed Aug 04 03:38:20 2004 DLH5XND5.sys f7aa7000 14912 544 4960 Mon Oct 23 23:28:13 2000 i8042prt.sys f798f000 12160 256 23040 Wed Aug 04 03:44:36 2004 mouclass.sys f7aaf000 6144 896 5888 Wed Aug 04 03:28:32 2004 kbdclass.sys f7ab7000 6912 896 6528 Wed Aug 04 03:28:32 2004 imapi.sys f799f000 11776 256 19584 Wed Aug 04 03:30:12 2004 cdrom.sys f79af000 33536 128 5888 Wed Aug 04 03:29:52 2004 redbook.sys f79bf000 6656 1152 36352 Wed Aug 04 03:29:34 2004 usbuhci.sys f7abf000 16512 384 0 Wed Aug 04 03:38:34 2004 USBPORT.SYS f70c4000 119808 1024 10752 Wed Aug 04 03:38:34 2004 fdc.sys f7ac7000 19200 256 384 Wed Aug 04 03:29:25 2004 serial.sys f79cf000 12160 384 30464 Wed Aug 04 03:45:51 2004 serenum.sys f7c67000 2944 128 7808 Wed Aug 04 03:29:06 2004 parport.sys f70b0000 67072 1280 256 Wed Aug 04 03:29:04 2004 audstub.sys f7ebb000 128 0 512 Fri Aug 17 18:29:40 2001 rasl2tp.sys f79df000 44672 512 0 Wed Aug 04 03:44:21 2004 ndistapi.sys f7c6b000 5248 128 0 Fri Aug 17 18:25:29 2001 ndiswan.sys f7099000 71552 2432 0 Wed Aug 04 03:44:30 2004 raspppoe.sys f781f000 31360 4608 0 Wed Aug 04 03:35:06 2004 raspptp.sys f782f000 40192 896 0 Wed Aug 04 03:44:26 2004 TDI.SYS f7acf000 10880 512 256 Wed Aug 04 03:37:47 2004 psched.sys f6fc0000 52480 2176 3968 Wed Aug 04 03:34:16 2004 msgpc.sys f783f000 28416 1408 512 Wed Aug 04 03:34:11 2004 ptilink.sys f7ad7000 12928 256 0 Fri Aug 17 18:19:53 2001 raspti.sys f7adf000 11008 640 0 Fri Aug 17 18:25:32 2001 rdpdr.sys f6f8f000 75520 4608 92160 Wed Aug 04 03:31:10 2004 termdd.sys f784f000 27520 768 2560 Wed Aug 04 03:28:52 2004 swenum.sys f7ca5000 384 128 640 Wed Aug 04 03:28:41 2004 update.sys f6f5b000 2304 1920 197376 Wed Aug 04 03:28:32 2004 mssmbios.sys f751a000 4480 1024 3840 Wed Aug 04 03:37:47 2004 NDProxy.SYS f785f000 29184 2176 0 Fri Aug 17 18:25:30 2001 ha10kx2k.sys f5d70000 446304 330752 1376 Wed Apr 02 21:29:43 2003 emupia2k.sys f5d4e000 42944 86272 1344 Tue Mar 25 06:43:27 2003 ctsfm2k.sys f5d2f000 116224 800 1536 Tue Mar 25 06:43:17 2003 ctac32k.sys f5d0f000 103520 19104 1344 Tue Mar 25 06:41:22 2003 hap16v2k.sys f5cee000 97728 26496 1472 Tue Apr 01 06:37:56 2003 usbhub.sys f786f000 28032 768 21120 Wed Aug 04 03:38:40 2004 USBD.SYS f7cc3000 256 0 896 Fri Aug 17 18:32:58 2001 flpydisk.sys f7b1f000 2048 1280 11776 Wed Aug 04 03:29:24 2004 Fs_Rec.SYS f7cc9000 128 128 3584 Fri Aug 17 18:19:37 2001 Null.SYS f7d64000 0 128 384 Fri Aug 17 18:17:39 2001 Beep.SYS f7ccb000 1152 0 0 Fri Aug 17 18:17:33 2001 vga.sys f7b37000 1024 128 15360 Wed Aug 04 03:37:06 2004 mnmdd.SYS f7ccd000 0 0 1792 Fri Aug 17 18:27:28 2001 RDPCDD.sys f7ccf000 0 0 1792 Fri Aug 17 18:16:56 2001 fwdrv.sys f5c4f000 94208 376832 0 Thu Apr 15 06:30:57 2004 Msfs.SYS f7b3f000 896 128 12032 Wed Aug 04 03:30:37 2004 Npfs.SYS f7b47000 1792 256 21120 Wed Aug 04 03:30:38 2004 rasacd.sys f7089000 3840 128 512 Fri Aug 17 18:25:39 2001 ipsec.sys f5c3c000 62464 2560 1536 Wed Aug 04 03:44:27 2004 tcpip.sys f5be4000 256384 42240 20096 Wed Aug 04 03:44:39 2004 aswTdi.SYS f788f000 22112 5568 0 Sat Mar 12 05:41:38 2005 netbt.sys f5bbc000 109824 1664 34048 Wed Aug 04 03:44:36 2004 afd.sys f5b9a000 4096 2048 111488 Wed Aug 04 03:44:13 2004 netbios.sys f789f000 14976 768 12160 Wed Aug 04 03:33:19 2004 rdbss.sys f5b6f000 35328 2816 111872 Wed Oct 27 22:43:57 2004 mrxsmb.sys f5ad8000 114048 20992 275456 Wed Jan 19 00:56:50 2005 Fips.SYS f78bf000 22016 768 3584 Fri Aug 17 23:01:49 2001 ipnat.sys f5ab7000 77952 37120 5888 Wed Sep 29 19:58:36 2004 wanarp.sys f78cf000 22528 896 3456 Wed Aug 04 03:34:57 2004 arp1394.sys f78df000 53504 1536 0 Wed Aug 04 03:28:28 2004 Aavmker4.SYS f7b57000 9312 3584 0 Sat Mar 12 05:40:36 2005 hidusb.sys f5e3f000 4352 128 1920 Fri Aug 17 18:32:16 2001 HIDCLASS.SYS f78ff000 21376 256 8320 Wed Aug 04 03:38:18 2004 HIDPARSE.SYS f7b5f000 11264 1408 8576 Wed Aug 04 03:38:15 2004 HidBatt.sys f7b67000 14592 128 0 Fri Aug 17 18:27:58 2001 Cdfs.SYS f792f000 6912 640 46336 Wed Aug 04 03:44:09 2004 dump_atapi.sys f59d7000 0 0 0 dump_WMILIB.SYS f7ced000 0 0 0 win32k.sys bf800000 1614464 77184 0 Wed Aug 04 03:47:30 2004 watchdog.sys f7a1f000 3712 128 8576 Wed Aug 04 03:37:32 2004 Dxapi.sys f7c4b000 6272 384 640 Fri Aug 17 18:23:19 2001 dxg.sys bf9c1000 61312 896 0 Wed Aug 04 03:30:51 2004 dxgthk.sys f7d61000 128 0 0 Fri Aug 17 18:23:12 2001 nv4_disp.dll bf9d3000 2931968 596992 0 Fri Oct 29 22:45:58 2004 ATMFD.DLL bffa0000 208512 34560 0 Wed Aug 04 05:26:56 2004 ndisuio.sys f59f7000 7168 256 768 Wed Aug 04 03:33:10 2004 mrxdav.sys f4042000 26368 5504 129024 Wed Aug 04 03:30:49 2004 wdmaud.sys f4005000 8832 2048 64384 Wed Aug 04 03:45:03 2004 sysaudio.sys f4b27000 3072 128 47360 Wed Aug 04 03:45:54 2004 ParVdm.SYS f7ca7000 1408 128 0 Fri Aug 17 18:19:49 2001 aswMon2.SYS f3f03000 29056 46080 0 Fri Mar 11 10:13:25 2005 srv.sys f3d98000 54400 8192 240896 Wed Aug 04 03:44:44 2004 PfModNT.sys f401a000 2816 10400 0 Wed Mar 05 00:49:28 2003 aswRdr.sys f3d3c000 8320 1120 0 Sat Mar 12 05:41:55 2005 kmixer.sys f2611000 14336 35840 105216 Wed Aug 04 03:37:46 2004 ntdll.dll 7c900000 503808 20480 0 Wed Aug 04 05:26:36 2004 By the looks of things, ntoskrnl.exe is the culprit. Am I right to assume that? Secondly, what can I do to correct the problem? If I do an XP repair from the disk, a) would that possibly fix the problem and b) will it effect any of my programs and settings within XP or other programs? Thanks.

Rt side-D1 for the info http://aumha.org/win5/kbestop.htm

Thanks. I know what the error is, however what I'm trying to determine is what driver is causing it and what I can do to fix it.