Buffer overrun detected explorer.exe

Bonjour,
J'ai également le problème BUFFER OVERRUN DETECTED.
Programs : c:/windows/explorer.exe

J'ai comme antivirus NOD32
Le LOG d'Hijackthis est :
Logfile of HijackThis v1.99.1
Scan saved at 14:38:03, on 22/03/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16414)

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Windows Defender\MsMpEng.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\ThinkPad\ConnectUtilities\AcPrfMgrSvc.exe
C:\Program Files\Lenovo\Bluetooth Software\bin\btwdins.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7Debug\mdm.exe
C:\Program Files\Eset\nod32krn.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\ThinkPad\ConnectUtilities\AcSvc.exe
C:\Program Files\ThinkPad\ConnectUtilities\SvcGuiHlpr.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\ThinkPad\ConnectUtilities\ACTray.exe
C:\Program Files\ThinkPad\ConnectUtilities\ACWLIcon.exe
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\Program Files\Eset\nod32kui.exe
C:\Program Files\Windows Defender\MSASCui.exe
C:\Program Files\MSN Messenger\MsnMsgr.Exe
C:\Program Files\TaskSwitchXP\TaskSwitchXP.exe
C:\Program Files\Lenovo\Bluetooth Software\BTTray.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpobnz08.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpotdd01.exe
C:\PROGRA~1\Lenovo\BLUETO~1\BTSTAC~1.EXE
C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpoevm08.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\Bin\hpoSTS08.exe
C:\WINDOWS\explorer.exe
C:\Program Files\MSN Messenger\usnsvc.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Documents and Settings\Marc\Mes documents\hijackthis_199\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.google.be/?gws_rd=ssl
O4 - HKLM\..\Run: [ACTray] C:\Program Files\ThinkPad\ConnectUtilities\ACTray.exe
O4 - HKLM\..\Run: [ACWLIcon] C:\Program Files\ThinkPad\ConnectUtilities\ACWLIcon.exe
O4 - HKLM\..\Run: [SynTPEnh] C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [nod32kui] "C:\Program Files\Eset\nod32kui.exe" /WAITSERVICE
O4 - HKLM\..\Run: [Windows Defender] "C:\Program Files\Windows Defender\MSASCui.exe" -masquer
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [TaskSwitchXP] C:\Program Files\TaskSwitchXP\TaskSwitchXP.exe
O4 - HKCU\..\Run: [XPize Reloader] C:\WINDOWS\XPize\XPizeReloader.exe /S
O4 - HKCU\..\Run: [HijackThis startup scan] C:\Documents and Settings\Marc\Mes documents\hijackthis_199\HijackThis.exe /startupscan
O4 - Global Startup: BTTray.lnk = ?
O4 - Global Startup: hp psc 2000 Series.lnk = C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpobnz08.exe
O4 - Global Startup: hpoddt01.exe.lnk = ?
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O8 - Extra context menu item: Envoyer au périphérique &Bluetooth... - C:\Program Files\Lenovo\Bluetooth Software\btsendto_ie_ctx.htm
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O11 - Options group: [INTERNATIONAL] International*
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/...
O16 - DPF: {76E5AF9D-2B3E-4FEB-A31F-A9E63A27FA29} (IASRunner Class) - https://support.lenovo.com/fr/en/
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O21 - SSODL: WPDShServiceObj - {AAA288BA-9A4C-45B0-95D7-94D524869DB5} - C:\WINDOWS\system32\WPDShServiceObj.dll
O23 - Service: Ac Profile Manager Service (AcPrfMgrSvc) - Unknown owner - C:\Program Files\ThinkPad\ConnectUtilities\AcPrfMgrSvc.exe
O23 - Service: Access Connections Main Service (AcSvc) - Lenovo - C:\Program Files\ThinkPad\ConnectUtilities\AcSvc.exe
O23 - Service: Bluetooth Service (btwdins) - Broadcom Corporation. - C:\Program Files\Lenovo\Bluetooth Software\bin\btwdins.exe
O23 - Service: NOD32 Kernel Service (NOD32krn) - Eset - C:\Program Files\Eset\nod32krn.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe

Est ce quelqu'un sait m'aider, ça commence à être franchement lourd comme problème..
Merci d'avance.

Configuration: Windows XP
Internet Explorer 7.0