problème virus trojan

Bonjour, quelqu'un pouraît-il m'aider.

j'ai apparemment plusieurs virus que ni AVG, ni avast n'arrivent à me supprimer. sur windows/system32
j'ai fais un log hijackthis, j'ai essayé de fixer des lignes, conclusion j'ai perdu ma connexion donc j'ai du réintégré les lignes fixées.
je vous laisse mon log.

Logfile of HijackThis v1.99.1
Scan saved at 15:25:26, on 19/01/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.5730.0011)

Running processes:
I:\WINDOWS\System32\smss.exe
I:\WINDOWS\system32\winlogon.exe
I:\WINDOWS\system32\services.exe
I:\WINDOWS\system32\lsass.exe
I:\WINDOWS\System32\Ati2evxx.exe
I:\WINDOWS\system32\svchost.exe
I:\WINDOWS\System32\svchost.exe
I:\WINDOWS\system32\Ati2evxx.exe
I:\WINDOWS\system32\spoolsv.exe
I:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
I:\Program Files\Alwil Software\Avast4\ashServ.exe
I:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
I:\Program Files\Fichiers communs\LightScribe\LSSrvc.exe
I:\Program Files\Fichiers communs\Microsoft Shared\VS7Debug\mdm.exe
I:\WINDOWS\System32\HPZipm12.exe
I:\Program Files\SiteAdvisor\5020\SAService.exe
I:\WINDOWS\system32\slserv.exe
I:\WINDOWS\System32\svchost.exe
I:\WINDOWS\Explorer.EXE
I:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
I:\Program Files\Alwil Software\Avast4\ashWebSv.exe
I:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe
I:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
I:\WINDOWS\system32\ctfmon.exe
I:\Program Files\Messenger\msmsgs.exe
I:\Program Files\eMule\emule.exe
I:\Program Files\SiteAdvisor\5020\SiteAdv.exe
I:\Program Files\Alwil Software\Avast4\ashSimpl.exe
I:\Program Files\Microsoft Office\Office10\WINWORD.EXE
I:\WINDOWS\msagent\AgentSvr.exe
I:\Program Files\Alwil Software\Avast4\ashChest.exe
I:\Program Files\Internet Explorer\IEXPLORE.EXE
I:\Documents and Settings\nathalie\Bureau\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.exalead.fr/search
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Microsoft Internet Explorer
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
F2 - REG:system.ini: UserInit=I:\WINDOWS\system32\Userinit.exe
O2 - BHO: Yahoo! Toolbar Helper - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - I:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: Aide pour le lien d'Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - I:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {089FD14D-132B-48FC-8861-0048AE113215} - I:\Program Files\SiteAdvisor\5020\SiteAdv.dll
O2 - BHO: Download Manager Browser Helper Object - {19C8E43B-07B3-49CB-BFFC-6777B593E6F8} - I:\PROGRA~1\FICHIE~1\fluxDVD\DOWNLO~1\XEBDLH~1.DLL
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - I:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - I:\Program Files\Java\jre1.5.0_09\bin\ssv.dll
O3 - Toolbar: McAfee SiteAdvisor - {0BF43445-2F28-4351-9252-17FE6E806AA0} - I:\Program Files\SiteAdvisor\5020\SiteAdv.dll
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - I:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O4 - HKLM\..\Run: [!AVG Anti-Spyware] "I:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe" /minimized
O4 - HKLM\..\Run: [avast!] I:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKCU\..\Run: [ctfmon.exe] I:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] "I:\Program Files\Messenger\msmsgs.exe" /background
O8 - Extra context menu item: &eBay Search - res://I:\Program Files\eBay\eBay Toolbar2\eBayTb.dll/RCSearch.html
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://I:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - I:\Program Files\Java\jre1.5.0_09\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - I:\Program Files\Java\jre1.5.0_09\bin\ssv.dll
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - I:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - I:\Program Files\Messenger\msmsgs.exe
O11 - Options group: [INTERNATIONAL] International*
O16 - DPF: {9A9307A0-7DA4-4DAF-B042-5009F29E09E1} (ActiveScan Installer Class) - http://acs.pandasoftware.com/activescan/as5free/asinst....
O17 - HKLM\System\CCS\Services\Tcpip\..\{92D086A2-A0CB-4654-8CE0-8853A4122295}: NameServer = 212.151.137.170 212.151.136.246
O18 - Protocol: siteadvisor - {3A5DC592-7723-4EAA-9EE6-AF4222BCF879} - I:\Program Files\SiteAdvisor\5020\SiteAdv.dll
O21 - SSODL: WPDShServiceObj - {AAA288BA-9A4C-45B0-95D7-94D524869DB5} - I:\WINDOWS\system32\WPDShServiceObj.dll
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - Unknown owner - I:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - I:\WINDOWS\System32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - I:\WINDOWS\system32\ati2sgag.exe
O23 - Service: avast! Antivirus - Unknown owner - I:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - Unknown owner - I:\Program Files\Alwil Software\Avast4\ashMaiSv.exe" /service (file missing)
O23 - Service: avast! Web Scanner - Unknown owner - I:\Program Files\Alwil Software\Avast4\ashWebSv.exe" /service (file missing)
O23 - Service: AVG Anti-Spyware Guard - Anti-Malware Development a.s. - I:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Hewlett-Packard Company - I:\Program Files\Fichiers communs\LightScribe\LSSrvc.exe
O23 - Service: Pml Driver HPZ12 - HP - I:\WINDOWS\System32\HPZipm12.exe
O23 - Service: Service CANALPLAY - Canal+ Active - I:\Program Files\Lecteur CANALPLAY\CanalPlayService.exe
O23 - Service: SiteAdvisor Service - Unknown owner - I:\Program Files\SiteAdvisor\5020\SAService.exe
O23 - Service: SmartLinkService (SLService) - Smart Link - I:\WINDOWS\SYSTEM32\slserv.exe