Hi,i get bsod's (mostly when closing program's,mostly games).Here is my memory.dmp:

Opened log file 'c:\debuglog.txt'
0: kd> .reload;!analyze -v;r;kv;lmnt;.logclose;q
Loading Kernel Symbols
..............................................................................................................
Loading User Symbols

Loading unloaded module list
..............................
ERROR: FindPlugIns 8007007b
*******************************************************************************
* *
* 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: 00000000, memory referenced
Arg2: 00000002, IRQL
Arg3: 00000000, value 0 = read operation, 1 = write operation
Arg4: e1c26b45, address which referenced memory

Debugging Details:
------------------

*** ERROR: Module load completed but symbols could not be loaded for ctoss2k.sys

READ_ADDRESS: 00000000

CURRENT_IRQL: 2

FAULTING_IP:
+ffffffffe1c26b45
e1c26b45 8b2b mov ebp,dword ptr [ebx]

DEFAULT_BUCKET_ID: DRIVER_FAULT

BUGCHECK_STR: 0xD1

PROCESS_NAME: Idle

TRAP_FRAME: 80475e1c -- (.trap 0xffffffff80475e1c)
.trap 0xffffffff80475e1c
ErrCode = 00000000
eax=00003820 ebx=00000000 ecx=872f9668 edx=872f9668 esi=872f9668 edi=00000000
eip=e1c26b45 esp=80475e90 ebp=80475eb8 iopl=0 nv up ei pl zr na pe nc
cs=0008 ss=0010 ds=0023 es=0023 fs=0030 gs=0000 efl=00010246
e1c26b45 8b2b mov ebp,dword ptr [ebx] ds:0023:00000000=????????
.trap
Resetting default scope

LAST_CONTROL_TRANSFER: from e1c26b45 to 8046b1ac

STACK_TEXT:
80475e1c e1c26b45 af86efa0 88595c08 bfd73e3c nt!KiTrap0E+0x210
WARNING: Frame IP not in any known module. Following frames may be wrong.
80475eb8 e1c130f2 00000000 86ce5008 86d40788 0xe1c26b45
80475f04 bfa05f7e 86d40788 80467739 86ce5d08 0xe1c130f2
80475f0c 80467738 86ce5d08 00000000 86ce5d08 ctoss2k+0x6f7e
80475f24 80467690 0000000e 00000000 00000000 nt!KiRetireDpcList+0x47
80475f28 00000000 00000000 00000000 00000000 nt!KiIdleLoop+0x28


STACK_COMMAND: kb

FOLLOWUP_IP:
ctoss2k+6f7e
bfa05f7e c21000 ret 10h

SYMBOL_STACK_INDEX: 3

FOLLOWUP_NAME: MachineOwner

MODULE_NAME: ctoss2k

IMAGE_NAME: ctoss2k.sys

DEBUG_FLR_IMAGE_TIMESTAMP: 3b9d8ea6

SYMBOL_NAME: ctoss2k+6f7e

FAILURE_BUCKET_ID: 0xD1_ctoss2k+6f7e

BUCKET_ID: 0xD1_ctoss2k+6f7e

Followup: MachineOwner
---------

eax=ffdff13c ebx=0000000a ecx=00000000 edx=40000000 esi=e1c26b45 edi=00000000
eip=8046b1ac esp=80475e08 ebp=80475e1c iopl=0 nv up ei ng nz na pe nc
cs=0008 ss=0010 ds=0023 es=0023 fs=0030 gs=0000 efl=00000286
nt!KiTrap0E+0x210:
8046b1ac f7457000000200 test dword ptr [ebp+70h],20000h ss:0010:80475e8c=00010246
ChildEBP RetAddr Args to Child
80475e1c e1c26b45 af86efa0 88595c08 bfd73e3c nt!KiTrap0E+0x210 (FPO: [0,0] TrapFrame @ 80475e1c)
WARNING: Frame IP not in any known module. Following frames may be wrong.
80475eb8 e1c130f2 00000000 86ce5008 86d40788 0xe1c26b45
80475f04 bfa05f7e 86d40788 80467739 86ce5d08 0xe1c130f2
80475f0c 80467738 86ce5d08 00000000 86ce5d08 ctoss2k+0x6f7e
80475f24 80467690 0000000e 00000000 00000000 nt!KiRetireDpcList+0x47 (FPO: [0,1,0])
80475f28 00000000 00000000 00000000 00000000 nt!KiIdleLoop+0x28
start end module name
80062000 80076460 hal halmacpi.dll Thu Mar 20 18:04:42 2003 (3E7A733A)
80400000 805a2940 nt ntkrnlmp.exe Mon Mar 05 07:51:43 2007 (45EC3C8F)
a0000000 a0190cc0 win32k win32k.sys Mon Mar 05 22:12:13 2007 (45ED063D)
ac371000 ac3b8320 ATMFD ATMFD.DLL Thu Jun 19 19:43:49 2003 (3EF274E5)
ac779000 ac78cac0 ipsec ipsec.sys Mon Apr 21 11:19:40 2003 (3EA4363C)
acb52000 acb60fe0 Cdfs Cdfs.SYS Tue Apr 15 20:58:53 2003 (3E9CD4FD)
acb9a000 acbabf80 wdmaud wdmaud.sys Tue Apr 15 21:23:02 2003 (3E9CDAA6)
acd7f000 acd87240 Fips Fips.SYS Tue May 09 08:28:29 2000 (39182E9D)
ace8f000 aceac4a0 afd afd.sys Wed Apr 30 01:45:29 2003 (3EAF8D29)
acf7d000 acf888c0 sysaudio sysaudio.sys Tue Apr 15 21:21:44 2003 (3E9CDA58)
acfc5000 ad16ee20 ativvaxx ativvaxx.dll Tue Jul 18 19:39:07 2006 (44BD9B4B)
ad16f000 ad40a240 ati3duag ati3duag.dll Tue Jul 18 19:44:33 2006 (44BD9C91)
af40b000 af44d000 atikvmag atikvmag.dll unavailable (FFFFFFFE)
af44d000 af493000 ati2cqag ati2cqag.dll unavailable (FFFFFFFE)
af493000 af4d6000 ati2dvag ati2dvag.dll unavailable (FFFFFFFE)
af4fe000 af5bc000 dump_iastor dump_iastor.sys Mon Feb 12 12:46:47 2007 (45D0D237)
af5bc000 af63e5a0 Ntfs Ntfs.SYS Fri May 09 12:46:45 2003 (3EBC05A5)
af667000 af6cc620 mrxsmb mrxsmb.sys Wed May 31 00:14:13 2006 (447D4245)
af6df000 af708a20 rdbss rdbss.sys Mon Jul 18 22:42:03 2005 (42DC92AB)
af7a9000 af807ce0 vsdatant vsdatant.sys Thu Mar 08 22:29:37 2007 (45F0FED1)
af808000 af82fe00 netbt netbt.sys Wed Jul 16 12:44:26 2003 (3F15AB1A)
af830000 af87e240 tcpip tcpip.sys Tue Apr 25 06:38:49 2006 (444E2669)
bf8e7000 bf9113a0 update update.sys Tue Apr 15 21:22:01 2003 (3E9CDA69)
bf9b2000 bf9c8ba0 ndiswan ndiswan.sys Tue Apr 29 16:05:01 2003 (3EAF051D)
bf9c9000 bf9e0f20 emupia2k emupia2k.sys Mon Sep 10 21:14:17 2001 (3B9D8F99)
bf9e1000 bf9fe620 ctsfm2k ctsfm2k.sys Mon Sep 10 21:10:40 2001 (3B9D8EC0)
bf9ff000 bfa16940 ctoss2k ctoss2k.sys Mon Sep 10 21:10:14 2001 (3B9D8EA6)
bfa17000 bfa36d00 KS KS.SYS Wed Dec 04 09:09:38 2002 (3DEE36D2)
bfa37000 bfa5b1e0 portcls portcls.sys Tue Apr 15 21:11:22 2003 (3E9CD7EA)
bfa5c000 bfb6dca0 e10kx2k e10kx2k.sys Tue Oct 02 00:06:30 2001 (3BB96776)
bfb6e000 bfb8fb20 USBPORT USBPORT.SYS Mon Mar 10 07:47:39 2003 (3E6CB39B)
bfb90000 bfbc8300 yk50x86 yk50x86.sys Wed Mar 30 07:14:47 2005 (424AC267)
bfbc9000 bfd63000 ati2mtag ati2mtag.sys Tue Jul 18 19:58:14 2006 (44BD9FC6)
bfd73000 bfd76e60 TDI TDI.SYS Wed Jan 15 11:56:26 2003 (3E25BCEA)
bfd83000 bfd852e0 ndistapi ndistapi.sys Wed Jan 15 11:54:15 2003 (3E25BC67)
bfdbf000 bfdc1dc0 itchfltr itchfltr.sys Thu Dec 18 13:00:48 2003 (3FE21580)
bfdcb000 bfdcd540 gameenum gameenum.sys Wed Jan 15 11:45:32 2003 (3E25BA5C)
bfe03000 bfe18be0 Mup Mup.sys Thu Dec 02 19:37:23 2004 (41AFDF73)
bfe19000 bfe2d000 srescan srescan.sys Mon Jan 15 14:16:30 2007 (45ABFD3E)
bfe2d000 bfe56aa0 NDIS NDIS.sys Tue Apr 29 16:05:01 2003 (3EAF051D)
bfe57000 bfe687c0 KSecDD KSecDD.sys Sat Sep 20 17:32:19 2003 (3F6CF193)
bfe69000 bfe8b3c0 Fastfat Fastfat.sys Wed Jan 15 11:48:39 2003 (3E25BB17)
bfe8c000 bfe9e0c0 SCSIPORT SCSIPORT.SYS Fri May 16 18:11:02 2003 (3EC58C26)
bfe9f000 bfeb4180 Unknown_Module_bfe9f000 Unknown_Module_bfe9f000 Tue Apr 01 10:08:25 2003 (3E89D599)
bfeb5000 bff73000 iaStor iaStor.sys Mon Feb 12 12:46:47 2007 (45D0D237)
bff73000 bff949c0 dmio dmio.sys Wed Jan 15 11:47:04 2003 (3E25BAB8)
bff95000 bffb1220 ftdisk ftdisk.sys Mon Mar 31 14:21:58 2003 (3E88BF86)
bffb2000 bffd9c20 ACPI ACPI.sys Wed Jan 15 11:44:22 2003 (3E25BA16)
bffda000 bffffe00 d347bus d347bus.sys Sun Aug 22 06:31:09 2004 (4128A01D)
eb000000 eb00e6a0 pci pci.sys Wed Jan 15 11:44:07 2003 (3E25BA07)
eb010000 eb019220 ohci1394 ohci1394.sys Wed Jan 15 11:46:43 2003 (3E25BAA3)
eb020000 eb029e20 1394BUS 1394BUS.SYS Mon Apr 07 22:56:58 2003 (3E9264AA)
eb030000 eb03b680 isapnp isapnp.sys Wed Jan 15 11:43:47 2003 (3E25B9F3)
eb040000 eb048700 CLASSPNP CLASSPNP.SYS Wed Jan 15 11:42:51 2003 (3E25B9BB)
eb050000 eb058b80 PxHelp20 PxHelp20.sys Wed Oct 18 10:33:53 2006 (45366581)
eb0e0000 eb0ec4c0 VIDEOPRT VIDEOPRT.SYS Wed Jan 15 11:47:20 2003 (3E25BAC8)
eb0f0000 eb0fffc0 ctac32k ctac32k.sys Mon Sep 10 21:09:58 2001 (3B9D8E96)
eb100000 eb10b680 i8042prt i8042prt.sys Tue Apr 15 21:00:59 2003 (3E9CD57B)
eb110000 eb11b880 L8042pr2 L8042pr2.sys Wed Dec 17 11:38:10 2003 (3FE0B0A2)
eb120000 eb12f760 lmouflt2 lmouflt2.sys Wed Dec 17 11:38:27 2003 (3FE0B0B3)
eb130000 eb13ca80 rasl2tp rasl2tp.sys Tue Apr 29 16:05:06 2003 (3EAF0522)
eb140000 eb14bc40 raspptp raspptp.sys Wed May 14 16:47:00 2003 (3EC2D574)
eb170000 eb179be0 usbhub usbhub.sys Tue Mar 18 15:30:41 2003 (3E77AC21)
eb180000 eb18c160 usbhub20 usbhub20.sys Wed Jan 15 11:45:59 2003 (3E25BA77)
eb1a0000 eb1a9ce0 NDProxy NDProxy.SYS Thu Sep 30 16:25:35 1999 (37F3F16F)
eb1b0000 eb1bbb80 avgntdd avgntdd.sys Thu Feb 22 09:20:11 2007 (45DDD0CB)
eb1c0000 eb1c8fa0 Npfs Npfs.SYS Sat Oct 09 16:58:07 1999 (37FFD68F)
eb1d0000 eb1d8680 msgpc msgpc.sys Wed Jan 15 11:54:25 2003 (3E25BC71)
eb1f0000 eb1f81a0 netbios netbios.sys Tue Oct 12 12:34:19 1999 (38038D3B)
eb210000 eb219400 avipbb avipbb.sys Mon Mar 19 08:41:09 2007 (45FEBD25)
eb280000 eb285520 PCIIDEX PCIIDEX.SYS Tue Feb 25 10:31:08 2003 (3E5BB66C)
eb288000 eb28f4c0 MountMgr MountMgr.sys Tue Feb 10 11:47:53 2004 (40293569)
eb290000 eb297720 disk disk.sys Wed Jan 15 11:43:05 2003 (3E25B9C9)
eb2b0000 eb2b5880 ssmdrv ssmdrv.sys Wed Feb 28 07:43:23 2007 (45E5A31B)
eb2b8000 eb2bc400 ptilink ptilink.sys Wed Jan 15 11:47:15 2003 (3E25BAC3)
eb2c8000 eb2cc0e0 raspti raspti.sys Fri Oct 08 13:45:10 1999 (37FE57D6)
eb2d0000 eb2d7d00 wanarp wanarp.sys Fri Aug 16 05:25:01 2002 (3D5CEF1D)
eb300000 eb304a60 flpydisk flpydisk.sys Wed Jan 15 11:42:52 2003 (3E25B9BC)
eb318000 eb31dfa0 HIDCLASS HIDCLASS.SYS Wed Jan 15 11:45:26 2003 (3E25BA56)
eb330000 eb335900 HIDPARSE HIDPARSE.SYS Tue Apr 08 10:34:46 2003 (3E930836)
eb340000 eb347f40 uhcd uhcd.sys Wed Jan 15 11:45:50 2003 (3E25BA6E)
eb358000 eb35cfc0 USBD USBD.SYS Wed Jan 22 09:05:33 2003 (3E2ECF5D)
eb368000 eb36cc00 usbehci usbehci.sys Mon May 05 13:50:04 2003 (3EB6CE7C)
eb380000 eb386580 fdc fdc.sys Wed Jan 15 11:42:51 2003 (3E25B9BB)
eb398000 eb39dec0 kbdclass kbdclass.sys Thu Feb 20 08:37:30 2003 (3E55044A)
eb3a0000 eb3a6a20 EFS EFS.SYS Wed Jan 15 11:46:55 2003 (3E25BAAF)
eb3b0000 eb3b5240 Msfs Msfs.SYS Tue Oct 26 16:21:32 1999 (3816377C)
eb3e0000 eb3e5400 mouclass mouclass.sys Thu Feb 20 08:37:45 2003 (3E550459)
eb3f0000 eb3f6c40 cdrom cdrom.sys Wed Jan 15 11:43:04 2003 (3E25B9C8)
eb410000 eb412a20 BOOTVID BOOTVID.dll Wed Nov 03 17:24:33 1999 (3820E051)
eb414000 eb416d00 PartMgr PartMgr.sys Wed Jan 15 11:43:07 2003 (3E25B9CB)
eb418000 eb41ae00 avgntmgr avgntmgr.sys Wed Nov 15 01:20:15 2006 (455ADBCF)
eb4d8000 eb4db540 hidusb hidusb.sys Mon Oct 04 16:03:30 1999 (37F93242)
eb4ec000 eb4ef580 vga vga.sys Sat Sep 25 11:37:40 1999 (37ED1674)
eb500000 eb501d20 Diskperf Diskperf.sys Wed Feb 12 13:34:38 2003 (3E4ABDEE)
eb502000 eb503b80 dmload dmload.sys Wed Jan 15 11:47:06 2003 (3E25BABA)
eb504000 eb505480 d347prt d347prt.sys Sun Aug 22 06:31:48 2004 (4128A044)
eb510000 eb5115e0 ctprxy2k ctprxy2k.sys Mon Sep 10 21:10:18 2001 (3B9D8EAA)
eb514000 eb515420 ASACPI ASACPI.sys Thu Aug 12 19:52:52 2004 (411C2D04)
eb57a000 eb57bca0 Fs_Rec Fs_Rec.SYS Wed Jan 15 11:53:30 2003 (3E25BC3A)
eb582000 eb583e40 rasacd rasacd.sys Sat Sep 25 11:41:23 1999 (37ED1753)
eb5b0000 eb5b1100 PfModNT PfModNT.sys Wed Dec 15 20:14:08 1999 (38586710)
eb5c8000 eb5c8f80 WMILIB WMILIB.SYS Sat Sep 25 11:36:47 1999 (37ED163F)
eb5c9000 eb5c9b00 pciide pciide.sys Wed Jan 15 11:43:03 2003 (3E25B9C7)
eb5fb000 eb5fb980 Cdr4_2K Cdr4_2K.SYS Wed Aug 10 11:28:07 2005 (42FA4737)
eb5fe000 eb5fea00 Cdralw2k Cdralw2k.SYS Wed Aug 10 11:28:04 2005 (42FA4734)
eb600000 eb600a40 audstub audstub.sys Sat Sep 25 11:35:33 1999 (37ED15F5)
eb60a000 eb60b000 swenum swenum.sys Wed Dec 04 09:10:07 2002 (3DEE36EF)
eb61b000 eb61b9e0 Null Null.SYS Sat Sep 25 11:34:58 1999 (37ED15D2)
eb61d000 eb61dee0 Beep Beep.SYS Wed Oct 20 15:18:59 1999 (380E3FD3)
eb620000 eb620f80 mnmdd mnmdd.SYS Sat Sep 25 11:37:40 1999 (37ED1674)

Unloaded modules:
acbac000 acbe7000 srv.sys
Timestamp: unavailable (00000000)
Checksum: 00000000
aa287000 aa2ac000 kmixer.sys
Timestamp: unavailable (00000000)
Checksum: 00000000
aa272000 aa287000 VGA.dll
Timestamp: unavailable (00000000)
Checksum: 00000000
aa272000 aa287000 VGA.dll
Timestamp: unavailable (00000000)
Checksum: 00000000
aa297000 aa2ac000 VGA.dll
Timestamp: unavailable (00000000)
Checksum: 00000000
aa297000 aa2ac000 VGA.dll
Timestamp: unavailable (00000000)
Checksum: 00000000
aa287000 aa2ac000 kmixer.sys
Timestamp: unavailable (00000000)
Checksum: 00000000
aa272000 aa287000 VGA.dll
Timestamp: unavailable (00000000)
Checksum: 00000000
aa272000 aa287000 VGA.dll
Timestamp: unavailable (00000000)
Checksum: 00000000
aa297000 aa2ac000 VGA.dll
Timestamp: unavailable (00000000)
Checksum: 00000000
aa297000 aa2ac000 VGA.dll
Timestamp: unavailable (00000000)
Checksum: 00000000
ac34c000 ac371000 kmixer.sys
Timestamp: unavailable (00000000)
Checksum: 00000000
ac337000 ac34c000 VGA.dll
Timestamp: unavailable (00000000)
Checksum: 00000000
ac337000 ac34c000 VGA.dll
Timestamp: unavailable (00000000)
Checksum: 00000000
ac35c000 ac371000 VGA.dll
Timestamp: unavailable (00000000)
Checksum: 00000000
ac35c000 ac371000 VGA.dll
Timestamp: unavailable (00000000)
Checksum: 00000000
aca85000 acaaa000 kmixer.sys
Timestamp: unavailable (00000000)
Checksum: 00000000
acf2d000 acf3a000 DMusic.sys
Timestamp: unavailable (00000000)
Checksum: 00000000
ace2f000 ace3d000 swmidi.sys
Timestamp: unavailable (00000000)
Checksum: 00000000
bf912000 bf922000 Serial.SYS
Timestamp: unavailable (00000000)
Checksum: 00000000
eb3c0000 eb3c7000 Parport.SYS
Timestamp: unavailable (00000000)
Checksum: 00000000
eb338000 eb33d000 RadProbe.sys
Timestamp: unavailable (00000000)
Checksum: 00000000
af4c1000 af4d6000 VGA.dll
Timestamp: unavailable (00000000)
Checksum: 00000000
af493000 af4d6000 ati2dvag.dll
Timestamp: unavailable (00000000)
Checksum: 00000000
af44d000 af493000 ati2cqag.dll
Timestamp: unavailable (00000000)
Checksum: 00000000
af40b000 af44d000 atikvmag.dll
Timestamp: unavailable (00000000)
Checksum: 00000000
eb200000 eb209000 redbook.sys
Timestamp: unavailable (00000000)
Checksum: 00000000
eb378000 eb37d000 Cdaudio.SYS
Timestamp: unavailable (00000000)
Checksum: 00000000
eb4e0000 eb4e3000 Sfloppy.SYS
Timestamp: unavailable (00000000)
Checksum: 00000000
eb2d8000 eb2dd000 RadProbe.sys
Timestamp: unavailable (00000000)
Checksum: 00000000
Closing open log file c:\debuglog.txt

Well,it seems to be some driver problem,but which one?