Analyse hijack this SVP

bonjour depuis quelques jours mon pc affiche un ecran noir au bout de quelques minutes d'utilisation, il m'est impossible de recuperer la main sans faire un reboot : voici le log hijack this :

Logfile of HijackThis v1.99.1
Scan saved at 08:08:32, on 09/03/2006
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

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:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
E:\program files\avaast\aswUpdSv.exe
E:\program files\avaast\ashServ.exe
C:\WINDOWS\system32\CTsvcCDA.EXE
C:\Program Files\Fichiers communs\Microsoft Shared\VS7Debug\mdm.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\slserv.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Fichiers communs\Ulead Systems\DVD\ULCDRSvr.exe
C:\WINDOWS\system32\MsPMSPSv.exe
C:\WINDOWS\system32\svchost.exe
E:\program files\avaast\ashMaiSv.exe
E:\program files\avaast\ashWebSv.exe
C:\WINDOWS\autoclk.exe
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
E:\PROGRA~1\avaast\ashDisp.exe
E:\program files\creative\Program\AHQInit.exe
E:\program files\creative\Program\CTAvTray.EXE
E:\program files\creative\AudioHQ\AHQTB.EXE
E:\Program Files\Logitech\MediaLife\MediaLifeService.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\SAGEM\SAGEM F@st 800-840\dslmon.exe
E:\program files\Logitech\SetPoint\SetPoint.exe
C:\Program Files\NETGEAR\WG111v2 Configuration Utility\RtlWake.exe
C:\Program Files\Fichiers communs\Logitech\KHAL\KHALMNPR.EXE
C:\Documents and Settings\Propriétaire.ENZONINO\Bureau\spyware\HijackThis.exe
C:\WINDOWS\system32\wuauclt.exe
C:\WINDOWS\system32\wscntfy.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://google.fr
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Francescoli explorer
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [cnxsys] C:\WINDOWS\System32\cnxsys.exe
O4 - HKLM\..\Run: [autoclk] autoclk.exe
O4 - HKLM\..\Run: [UserFaultCheck] %systemroot%\system32\dumprep 0 -u
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [avast!] E:\PROGRA~1\avaast\ashDisp.exe
O4 - HKLM\..\Run: [UpdReg] C:\WINDOWS\Updreg.exe
O4 - HKLM\..\Run: [AHQInit] e:\program files\creative\Program\AHQInit.exe
O4 - HKLM\..\Run: [CTAvTray] E:\program files\creative\Program\CTAvTray.EXE
O4 - HKLM\..\Run: [AudioHQ] e:\program files\creative\AudioHQ\AHQTB.EXE
O4 - HKLM\..\Run: [MediaLifeService] "E:\Program Files\Logitech\MediaLife\MediaLifeService.exe"
O4 - HKLM\..\Run: [Logitech Hardware Abstraction Layer] KHALMNPR.EXE
O4 - HKLM\..\RunOnce: [CTAVTray] e:\program files\creative\Program\CTAvStub.EXE EAX.AVI
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - Global Startup: DSLMON.lnk = C:\Program Files\SAGEM\SAGEM F@st 800-840\dslmon.exe
O4 - Global Startup: Logitech SetPoint.lnk = E:\program files\Logitech\SetPoint\SetPoint.exe
O4 - Global Startup: WG111v2 Smart Wizard Wireless Setting.lnk = ?
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Restrictions present
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O6 - HKLM\Software\Policies\Microsoft\Internet Explorer\Restrictions present
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: Ouvrir le fichier PDF dans Word - res://C:\Program Files\ScanSoft\OmniPagePro14.0\PdfCnv\IEShellExt.dll /300
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\j2re1.4.2_04\bin\npjpi142_04.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\j2re1.4.2_04\bin\npjpi142_04.dll
O9 - Extra button: AIM - {AC9E2541-2814-11d5-BC6D-00B0D0A1DE45} - C:\Program Files\AIM95\aim.exe
O9 - Extra button: Real.com - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - C:\WINDOWS\System32\Shdocvw.dll
O12 - Plugin for .m4a: C:\Program Files\Internet Explorer\PLUGINS\npqtplugin5.dll
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - Unknown owner - E:\program files\avaast\aswUpdSv.exe
O23 - Service: avast! Antivirus - Unknown owner - E:\program files\avaast\ashServ.exe
O23 - Service: avast! Mail Scanner - Unknown owner - E:\program files\avaast\ashMaiSv.exe" /service (file missing)
O23 - Service: avast! Web Scanner - Unknown owner - E:\program files\avaast\ashWebSv.exe" /service (file missing)
O23 - Service: Creative Service for CDROM Access - Creative Technology Ltd - C:\WINDOWS\system32\CTsvcCDA.EXE
O23 - Service: NVIDIA Driver Helper Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: SmartLinkService (SLService) - - C:\WINDOWS\SYSTEM32\slserv.exe
O23 - Service: Ulead Burning Helper (UleadBurningHelper) - Ulead Systems, Inc. - C:\Program Files\Fichiers communs\Ulead Systems\DVD\ULCDRSvr.exe

par avance merci