Merci beaucoup pour ta réponse, j'ai fait le scan avec HiJackThis
Voici le rapport :
Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 18:30:54, on 26/02/2010
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
Boot mode: Normal
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:\Program Files\Fichiers communs\Symantec Shared\ccProxy.exe
C:\Program Files\Fichiers communs\Symantec Shared\ccSetMgr.exe
C:\Program Files\Fichiers communs\Symantec Shared\ccEvtMgr.exe
C:\Program Files\Alwil Software\Avast5\AvastSvc.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\ThinkPad\ConnectUtilities\AcPrfMgrSvc.exe
C:\Program Files\Diskeeper Corporation\Diskeeper\DkService.exe
C:\Program Files\Norton Internet Security\Norton AntiVirus\navapsvc.exe
C:\Program Files\Lenovo\PM Driver\PMSveH.exe
c:\program files\lenovo\system update\suservice.exe
C:\Program Files\Fichiers communs\Lenovo\tvt_reg_monitor_svc.exe
C:\Program Files\Lenovo\Rescue and Recovery\rrservice.exe
C:\Program Files\Fichiers communs\Lenovo\Scheduler\tvtsched.exe
C:\Program Files\ThinkPad\ConnectUtilities\AcSvc.exe
C:\Program Files\Fichiers communs\Lenovo\Logger\logmon.exe
C:\WINDOWS\system32\wuauclt.exe
C:\WINDOWS\system32\wbem\wmiapsrv.exe
C:\Program Files\ThinkPad\ConnectUtilities\SvcGuiHlpr.exe
C:\WINDOWS\SoftwareDistribution\Download\72435c12e13d6da3bbaa7c93396b47e3\update\update.exe
C:\WINDOWS\system32\wuauclt.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\SoftwareDistribution\Download\Install\NDP1.1sp1-KB953297-X86.exe
C:\Program Files\Diskeeper Corporation\Diskeeper\DkIcon.exe
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\Program Files\Lenovo\HOTKEY\TPHKMGR.exe
C:\Program Files\Lenovo\HOTKEY\TpWAudAp.exe
C:\PROGRA~1\Lenovo\PMDRIV~1\PMHandler.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\RTHDCPL.EXE
C:\WINDOWS\AGRSMMSG.exe
C:\WINDOWS\system32\WLTRAY.exe
C:\WINDOWS\system32\igfxtray.exe
C:\WINDOWS\system32\hkcmd.exe
C:\WINDOWS\system32\igfxpers.exe
C:\Program Files\Google\Google Desktop Search\GoogleDesktop.exe
C:\Program Files\Java\jre1.5.0_06\bin\jusched.exe
C:\Program Files\Fichiers communs\Lenovo\Scheduler\scheduler_proxy.exe
C:\Program Files\Fichiers communs\InstallShield\UpdateService\issch.exe
C:\Program Files\Google\Google Desktop Search\GoogleDesktopIndex.exe
C:\PROGRA~1\Lenovo\LENOVO~2\LPMGR.exe
C:\Program Files\ThinkVantage\AMSG\Amsg.exe
C:\Program Files\Fichiers communs\Symantec Shared\ccApp.exe
C:\Program Files\Fichiers communs\Symantec Shared\Security Center\UsrPrmpt.exe
C:\Program Files\ThinkPad\ConnectUtilities\ACTray.exe
C:\Program Files\ThinkPad\ConnectUtilities\ACWLIcon.exe
C:\Program Files\Picasa2\PicasaMediaDetector.exe
C:\Program Files\Lenovo\Client Security Solution\cssauth.exe
C:\WINDOWS\system32\svchost.exe
C:\PROGRA~1\ALWILS~1\Avast5\avastUI.exe
C:\Program Files\Lenovo\Client Security Solution\tvtpwm_tray.exe
C:\Documents and Settings\sostyle\Mes documents\Downloads\Sniffle.exe
C:\Program Files\Fichiers communs\Symantec Shared\SNDSrvc.exe
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page =
http://www.lenovo.com/welcome/3000notebookR1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL =
http://www.lenovo.com/welcome/3000notebookR1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext =
http://www.lenovo.com/welcome/3000notebookR0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.5.0_06\bin\ssv.dll
O2 - BHO: Norton Internet Security - {9ECB9560-04F9-4bbc-943D-298DDF1699E1} - C:\Program Files\Fichiers communs\Symantec Shared\AdBlocking\NISShExt.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar1.dll
O2 - BHO: NAV Helper - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Program Files\Norton Internet Security\Norton AntiVirus\NavShExt.dll
O2 - BHO: ThinkVantage Password Manager - {F040E541-A427-4CF7-85D8-75E3E0F476C5} - C:\Program Files\Lenovo\Client Security Solution\tvtpwm_ie_com.dll
O3 - Toolbar: Norton Internet Security - {0B53EAC3-8D69-4b9e-9B19-A37C9A5676A7} - C:\Program Files\Fichiers communs\Symantec Shared\AdBlocking\NISShExt.dll
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Program Files\Norton Internet Security\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar1.dll
O4 - HKLM\..\Run: [SynTPEnh] C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [TPHOTKEY] C:\Program Files\Lenovo\HOTKEY\TPHKMGR.exe
O4 - HKLM\..\Run: [TPWAUDAP] C:\Program Files\Lenovo\HOTKEY\TpWAudAp.exe
O4 - HKLM\..\Run: [PMHandler] C:\PROGRA~1\Lenovo\PMDRIV~1\PMHandler.exe
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [SkyTel] SkyTel.EXE
O4 - HKLM\..\Run: [Alcmtr] ALCMTR.EXE
O4 - HKLM\..\Run: [AzMixerSel] C:\Program Files\Realtek\InstallShield\AzMixerSel.exe
O4 - HKLM\..\Run: [AGRSMMSG] AGRSMMSG.exe
O4 - HKLM\..\Run: [Broadcom Wireless Manager UI] C:\WINDOWS\system32\WLTRAY.exe
O4 - HKLM\..\Run: [igfxtray] C:\WINDOWS\system32\igfxtray.exe
O4 - HKLM\..\Run: [igfxhkcmd] C:\WINDOWS\system32\hkcmd.exe
O4 - HKLM\..\Run: [igfxpers] C:\WINDOWS\system32\igfxpers.exe
O4 - HKLM\..\Run: [Google Desktop Search] "C:\Program Files\Google\Google Desktop Search\GoogleDesktop.exe" /startup
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\jre1.5.0_06\bin\jusched.exe
O4 - HKLM\..\Run: [TVT Scheduler Proxy] C:\Program Files\Fichiers communs\Lenovo\Scheduler\scheduler_proxy.exe
O4 - HKLM\..\Run: [ISUSPM Startup] C:\PROGRA~1\FICHIE~1\INSTAL~1\UPDATE~1\ISUSPM.exe -startup
O4 - HKLM\..\Run: [ISUSScheduler] "C:\Program Files\Fichiers communs\InstallShield\UpdateService\issch.exe" -start
O4 - HKLM\..\Run: [LPManager] C:\PROGRA~1\Lenovo\LENOVO~2\LPMGR.exe
O4 - HKLM\..\Run: [AMSG] C:\Program Files\ThinkVantage\AMSG\Amsg.exe
O4 - HKLM\..\Run: [ccApp] "C:\Program Files\Fichiers communs\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [IS CfgWiz] C:\Program Files\Norton Internet Security\cfgwiz.exe /GUID {257BBC47-1B26-432e-9F84-188603799DD3} /MODE CfgWiz /CMDLINE "REBOOT"
O4 - HKLM\..\Run: [URLLSTCK.exe] C:\Program Files\Norton Internet Security\UrlLstCk.exe
O4 - HKLM\..\Run: [SSC_UserPrompt] C:\Program Files\Fichiers communs\Symantec Shared\Security Center\UsrPrmpt.exe
O4 - HKLM\..\Run: [DiskeeperSystray] "C:\Program Files\Diskeeper Corporation\Diskeeper\DkIcon.exe"
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: [Picasa Media Detector] C:\Program Files\Picasa2\PicasaMediaDetector.exe
O4 - HKLM\..\Run: [cssauth] "C:\Program Files\Lenovo\Client Security Solution\cssauth.exe" silent
O4 - HKLM\..\Run: [avast5] C:\PROGRA~1\ALWILS~1\Avast5\avastUI.exe /nogui
O4 - HKCU\..\Run: [Google Update] "C:\Documents and Settings\sostyle\Local Settings\Application Data\Google\Update\GoogleUpdate.exe" /c
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE RÉSEAU')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - Global Startup: Lancement rapide d'Adobe Reader.lnk = C:\Program Files\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O8 - Extra context menu item: &Traduire à partir de l'anglais -
res://C:\Program Files\Google\GoogleToolbar1.dll/cmwordtrans.html
O8 - Extra context menu item: Pages liées -
res://C:\Program Files\Google\GoogleToolbar1.dll/cmbacklinks.html
O8 - Extra context menu item: Pages similaires -
res://C:\Program Files\Google\GoogleToolbar1.dll/cmsimilar.html
O8 - Extra context menu item: Recherche &Google -
res://C:\Program Files\Google\GoogleToolbar1.dll/cmsearch.html
O8 - Extra context menu item: Version de la page actuelle disponible dans le cache Google -
res://C:\Program Files\Google\GoogleToolbar1.dll/cmcache.html
O9 - Extra button: (no name) - {0045D4BC-5189-4b67-969C-83BB1906C421} - C:\Program Files\Lenovo\Client Security Solution\tvtpwm_ie_com.dll
O9 - Extra 'Tools' menuitem: ThinkVantage Password Manager... - {0045D4BC-5189-4b67-969C-83BB1906C421} - C:\Program Files\Lenovo\Client Security Solution\tvtpwm_ie_com.dll
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_06\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_06\bin\ssv.dll
O9 - Extra button: System Update - {DA320635-F48C-4613-8325-D75A933C549E} - C:\Program Files\Lenovo\System Update\sulauncher.exe
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
O14 - IERESET.INF: START_PAGE_URL=http://www.lenovo.com/welcome/3000notebook
O16 - DPF: {E2883E8F-472F-4FB0-9522-AC9BF37916A7} -
http://platformdl.adobe.com/NOS/getPlusPlus/1.6/gp.cabO20 - AppInit_DLLs: C:\PROGRA~1\Google\GOOGLE~1\GOEC62~1.DLL
O20 - Winlogon Notify: ACNotify - ACNotify.dll (file missing)
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: avast! Antivirus - ALWIL Software - C:\Program Files\Alwil Software\Avast5\AvastSvc.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast5\AvastSvc.exe
O23 - Service: avast! Web Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast5\AvastSvc.exe
O23 - Service: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\ccEvtMgr.exe
O23 - Service: Symantec Network Proxy (ccProxy) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\ccProxy.exe
O23 - Service: Symantec Password Validation (ccPwdSvc) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\ccPwdSvc.exe
O23 - Service: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\ccSetMgr.exe
O23 - Service: Diskeeper - Diskeeper Corporation - C:\Program Files\Diskeeper Corporation\Diskeeper\DkService.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Fichiers communs\InstallShield\Driver\1150\Intel 32\IDriverT.exe
O23 - Service: IS Service (ISSVC) - Symantec Corporation - C:\Program Files\Norton Internet Security\ISSVC.exe
O23 - Service: Service Norton AntiVirus Auto-Protect (navapsvc) - Symantec Corporation - C:\Program Files\Norton Internet Security\Norton AntiVirus\navapsvc.exe
O23 - Service: PMSveH - Lenovo - C:\Program Files\Lenovo\PM Driver\PMSveH.exe
O23 - Service: IBM PSA Access Driver Control (PsaSrv) - Unknown owner - C:\WINDOWS\system32\PsaSrv.exe
O23 - Service: SAVScan - Symantec Corporation - C:\Program Files\Norton Internet Security\Norton AntiVirus\SAVScan.exe
O23 - Service: ScriptBlocking Service (SBService) - Symantec Corporation - C:\PROGRA~1\FICHIE~1\SYMANT~1\SCRIPT~1\SBServ.exe
O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\SNDSrvc.exe
O23 - Service: Symantec SPBBCSvc (SPBBCSvc) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\SPBBC\SPBBCSvc.exe
O23 - Service: System Update (SUService) - - c:\program files\lenovo\system update\suservice.exe
O23 - Service: ThinkVantage Registry Monitor Service - Unknown owner - C:\Program Files\Fichiers communs\Lenovo\tvt_reg_monitor_svc.exe
O23 - Service: TVT Backup Service - Lenovo Group Limited - C:\Program Files\Lenovo\Rescue and Recovery\rrservice.exe
O23 - Service: TVT Scheduler - Lenovo Group Limited - C:\Program Files\Fichiers communs\Lenovo\Scheduler\tvtsched.exe
--
End of file - 12671 bytes
PS : c'est un ordinateur portable de la marque lenovo, le modèle c'est Intel Celeron . (ou l'inverse, je confonds toujours modèle et marque) , et j'ai windows edition familiale XP SP2 .
Dans l'attente d'une réponse, je vous remercie