J'ai un message d'erreur au démarage de windows : erreur de rundll : impossible de lancer c:_windows`downloaded programfiles\bridge.dll le module est introuvable
Merci pour votre aide
Sinon si ca peut vous aider voici l'analyse de mon ordi par hijackthis

Logfile of HijackThis v1.98.0
Scan saved at 23:26:53, on 30/06/2004
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

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\ccSetMgr.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Fichiers communs\Symantec Shared\ccEvtMgr.exe
C:\WINDOWS\system32\spoolsv.exe
C:\PROGRA~1\FICHIE~1\AOL\ACS\AOLACSD.EXE
C:\Program Files\Fichiers communs\Symantec Shared\ccApp.exe
C:\PROGRA~1\TECHCI~1\AOLSAV\AOLAgent.exe
C:\Program Files\Fichiers communs\AOL\ACS\AOLDial.exe
C:\WINDOWS\System32\drivers\CDAC11BA.EXE
C:\WINDOWS\System32\DRIVERS\CDANTSRV.EXE
C:\Program Files\Fichiers communs\Symantec Shared\ccProxy.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Program Files\Fichiers communs\EPSON\EBAPI\SAgent2.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7Debug\mdm.exe
C:\Program Files\Norton Internet Security\Norton AntiVirus\navapsvc.exe
C:\Program Files\Norton Utilities\NPROTECT.EXE
C:\Program Files\Norton Utilities\SYSDOC32.EXE
C:\Program Files\Norton Internet Security\Norton AntiVirus\SAVScan.exe
C:\Program Files\AOL 9.0\aoltray.exe
C:\Program Files\Speed Disk\nopdb.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\wanmpsvc.exe
C:\Program Files\AOL 9.0\waol.exe
C:\Program Files\AOL 9.0\shellmon.exe
C:\Program Files\Fichiers communs\Aol\aoltpspd.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\Messenger\msmsgs.exe
C:\Program Files\Symantec\LiveUpdate\AUpdate.exe
C:\Documents and Settings\Administrateur\Mes documents\downloads\utilitaires divers\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = C:\Program Files\Copernic Agent\Web\SearchBar.htm
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
F0 - system.ini: Shell=
F2 - REG:system.ini: UserInit=C:\WINDOWS\system32\userinit.exe,
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: Web assistant - {9ECB9560-04F9-4bbc-943D-298DDF1699E1} - C:\Program Files\Fichiers communs\Symantec Shared\AdBlocking\NISShExt.dll
O2 - BHO: NAV Helper - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Program Files\Norton Internet Security\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: Web assistant - {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: Copernic Agent - {F2E259E8-0FC8-438C-A6E0-342DD80FA53E} - C:\PROGRA~1\COPERN~1\COPERN~1.DLL
O3 - Toolbar: AOL Toolbar - {4982D40A-C53B-4615-B15B-B5B5E98D167C} - C:\Program Files\AOL Toolbar\toolbar.dll
O4 - HKLM\..\Run: [ccApp] "C:\Program Files\Fichiers communs\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [URLLSTCK.exe] C:\Program Files\Norton Internet Security\UrlLstCk.exe
O4 - HKLM\..\Run: [NeroCheck] C:\WINDOWS\System32\\NeroCheck.exe
O4 - HKLM\..\Run: [AOLSAV] C:\PROGRA~1\TECHCI~1\AOLSAV\AOLAgent.exe
O4 - HKLM\..\Run: [AOLDialer] C:\Program Files\Fichiers communs\AOL\ACS\AOLDial.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [RunDLL] rundll32.exe "C:\WINDOWS\Downloaded Program Files\bridge.dll",Load
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [Symantec NetDriver Monitor] C:\PROGRA~1\Symantec\LIVEUP~1\SNDMon.EXE
O4 - Global Startup: Norton System Doctor.lnk = C:\Program Files\Norton Utilities\SYSDOC32.EXE
O4 - Global Startup: EPSON Status Monitor 3 Environment Check 2.lnk = C:\WINDOWS\system32\spool\drivers\w32x86\3\E_SRCV02.EXE
O4 - Global Startup: AOL 9.0 Icône AOL.lnk = C:\Program Files\AOL 9.0\aoltray.exe
O4 - Global Startup: Pense-bête.lnk = C:\Program Files\Broderbund\PrintMaster\PMREMIND.EXE
O8 - Extra context menu item: &Recherche AOL Toolbar - res://C:\Program Files\AOL Toolbar\toolbar.dll/SEARCH.HTML
O8 - Extra context menu item: Chercher avec Copernic Agent - C:\Program Files\Copernic Agent\Web\SearchExt.htm
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {193B17B0-7C9F-4D5B-AEAB-8D3605EFC084} - C:\PROGRA~1\COPERN~1\COPERN~1.EXE
O9 - Extra 'Tools' menuitem: Démarrer Copernic Agent - {193B17B0-7C9F-4D5B-AEAB-8D3605EFC084} - C:\PROGRA~1\COPERN~1\COPERN~1.EXE
O9 - Extra button: AOL Toolbar - {4982D40A-C53B-4615-B15B-B5B5E98D167C} - C:\Program Files\AOL Toolbar\toolbar.dll
O9 - Extra 'Tools' menuitem: AOL Toolbar - {4982D40A-C53B-4615-B15B-B5B5E98D167C} - C:\Program Files\AOL Toolbar\toolbar.dll
O9 - Extra button: Copernic Agent - {688DC797-DC11-46A7-9F1B-445F4F58CE6E} - C:\PROGRA~1\COPERN~1\COPERN~1.EXE
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Related - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O9 - Extra 'Tools' menuitem: Show &Related Links - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O9 - Extra button: Real.com - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - C:\WINDOWS\System32\Shdocvw.dll
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
O16 - DPF: Interface Chat Voila - http://chat15.x-echo.com/version4/Applet/vchatsign.cab
O16 - DPF: {1F831FA7-42FC-11D4-95A6-0080AD30DCE1} (InstaFred) - file://C:\Program Files\AutoCAD 2002 Fra\InstFred.ocx
O16 - DPF: {2BC66F54-93A8-11D3-BEB6-00105AA9B6AE} (Symantec AntiVirus scanner) - http://security.symantec.com/sscv6/SharedContent/vc/bin/AvSniff.cab
O16 - DPF: {644E432F-49D3-41A1-8DD5-E099162EEEC5} (Symantec RuFSI Utility Class) - http://security.symantec.com/sscv6/SharedContent/common/bin/cabsa.cab
O16 - DPF: {78AF2F24-A9C3-11D3-BF8C-0060B0FCC122} (Contrôle d'AcDcToday) - file://C:\Program Files\AutoCAD 2002 Fra\AcDcToday.ocx
O16 - DPF: {AE563727-B4F5-11D4-A415-00108302FDFD} (NOXLATE-BANR) - file://C:\Program Files\AutoCAD 2002 Fra\InstBanr.ocx
O16 - DPF: {CE28D5D2-60CF-4C7D-9FE8-0F47A3308078} (ActiveDataInfo Class) - http://www.symantec.com/techsupp/activedata/SymAData.cab
O16 - DPF: {E0CE16CB-741C-4B24-8D04-A817856E07F4} (IObjSafety.DemoCtl) - http://cabs.roings.com/cabs/serialzip.cab
O16 - DPF: {E77C0D62-882A-456F-AD8F-7C6C9569B8C7} (ActiveDataObj Class) - http://www.symantec.com/techsupp/activedata/ActiveData.cab
O16 - DPF: {F281A59C-7B65-11D3-8617-0010830243BD} (Gestion d'AcPreview) - file://C:\Program Files\AutoCAD 2002 Fra\AcPreview.ocx
O17 - HKLM\System\CCS\Services\Tcpip\..\{4F61B697-9F49-429D-A9FC-67FA3B3ED583}: NameServer = 205.188.146.146