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Voila un rapport de hijackthis :

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 18.05.30, on 24/05/2009
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\Explorer.EXE
C:\Programmi\Internet Explorer\IEXPLORE.EXE
C:\WINDOWS\System32\regsvr32.exe
C:\Programmi\Internet Explorer\IEXPLORE.EXE
E:\Spybot - Search & Destroy\SpybotSD.exe
C:\Programmi\Trend Micro\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://g.msn.fr/0SEFRFR/SAOS02
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.fr/
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = 127.0.0.1
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
R3 - URLSearchHook: (no name) - {E312764E-7706-43F1-8DAB-FCDD2B1E416D} - C:\Programmi\pdfforge Toolbar\SearchSettings.dll
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Programmi\File comuni\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: RealPlayer Download and Record Plugin for Internet Explorer - {3049C3E9-B461-4BC5-8870-4C09146192CA} - C:\Programmi\Real\RealPlayer\rpbrowserrecordplugin.dll
O2 - BHO: WormRadar.com IESiteBlocker.NavFilter - {3CA2F312-6F6E-4B53-A66E-4E65E497C8C0} - (no file)
O2 - BHO: precisead browser enhancer - {40BA8AE6-B091-020C-8FA0-43CDECE66902} - C:\WINDOWS\system32\lrduyyhlrencb.dll
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - E:\SPYBOT~1\SDHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programmi\Java\jre1.6.0_07\bin\ssv.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: precisead - {8cb36121-5086-beaa-2b02-d2315615b93a} - C:\WINDOWS\system32\nspA.dll
O2 - BHO: Programme d'aide de l'Assistant de connexion Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Programmi\File comuni\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: (no name) - {A057A204-BACC-4D26-9990-79A187E2698E} - (no file)
O2 - BHO: pdfforge Toolbar - {B922D405-6D13-4A2B-AE89-08A030DA4402} - C:\Programmi\pdfforge Toolbar\WidgiToolbarIE.dll
O2 - BHO: (no name) - {E312764E-7706-43F1-8DAB-FCDD2B1E416D} - C:\Programmi\pdfforge Toolbar\SearchSettings.dll
O3 - Toolbar: Veoh Browser Plug-in - {D0943516-5076-4020-A3B5-AEFAF26AB263} - C:\Programmi\Veoh Networks\Veoh\Plugins\reg\VeohToolbar.dll
O3 - Toolbar: pdfforge Toolbar - {B922D405-6D13-4A2B-AE89-08A030DA4402} - C:\Programmi\pdfforge Toolbar\WidgiToolbarIE.dll
O3 - Toolbar: (no name) - {A057A204-BACC-4D26-9990-79A187E2698E} - (no file)
O4 - HKLM\..\Run: [ooupayooqop] C:\WINDOWS\System32\regsvr32.exe /s "C:\WINDOWS\system32\lrduyyhlrencb.dll"
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User '?')
O4 - HKUS\S-1-5-21-484763869-1604221776-839522115-500\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User '?')
O4 - HKUS\S-1-5-21-484763869-1604221776-839522115-500\..\RunOnce: [NeroHomeFirstStart] C:\Programmi\File comuni\Ahead\Lib\NMFirstStart.exe (User '?')
O4 - HKUS\S-1-5-21-484763869-1604221776-839522115-501\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe (User '?')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User '?')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O8 - Extra context menu item: Add to Google Photos Screensa&ver - res://C:\WINDOWS\system32\GPhotos.scr/200
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://D:\PROGRA~1\MICROS~1\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.6.0_07\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.6.0_07\bin\ssv.dll
O9 - Extra button: Ajout Direct - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Programmi\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra 'Tools' menuitem: &Ajout Direct dans Windows Live Writer - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Programmi\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra button: Run WinHTTrack - {36ECAF82-3300-8F84-092E-AFF36D6C7040} - f:\Programmi\WinHTTrack\WinHTTrackIEBar.dll
O9 - Extra 'Tools' menuitem: Launch WinHTTrack - {36ECAF82-3300-8F84-092E-AFF36D6C7040} - f:\Programmi\WinHTTrack\WinHTTrackIEBar.dll
O9 - Extra button: Ricerche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\WINDOWS\system32\shdocvw.dll
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - E:\SPYBOT~1\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - E:\SPYBOT~1\SDHelper.dll
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\msmsgs.exe
O10 - Unknown file in Winsock LSP: c:\windows\system32\8461531.dll
O10 - Unknown file in Winsock LSP: c:\windows\system32\8461531.dll
O16 - DPF: {029FDBA6-3547-11D7-AA4C-0050BF051A00} - http://s.tf1.fr/mmdia/static/rawflow/clients/5.3.1.0/Rawflow.cab
O16 - DPF: {0CCA191D-13A6-4E29-B746-314DEE697D83} (Facebook Photo Uploader 5 Control) - http://upload.facebook.com/controls/2008.10.10_v5.5.8/FacebookPhotoUploader5.cab
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204
O16 - DPF: {20A60F0D-9AFA-4515-A0FD-83BD84642501} - http://messenger.zone.msn.com/binary/msgrchkr.cab56986.cab
O16 - DPF: {5C6698D9-7BE4-4122-8EC5-291D84DBD4A0} - http://upload.facebook.com/controls/FacebookPhotoUploader3.cab
O16 - DPF: {83AFB5CA-ED35-11D4-A452-0080C8D85045} - http://67.15.101.3/g_bin/eng/poker_2_0_0_46.cab
O16 - DPF: {EDFCB7CB-942C-4822-AF14-F0B687409848} (Image Uploader Control) - http://www.photostation.fr/telechargement/ImageUploader4.cab
O16 - DPF: {F9BF64A0-5A65-43E0-ACDB-B223E7F9DDD9} - http://193.251.82.104:81/WEBWATCH2.cab
O16 - DPF: {FDDBE2B8-6602-4AD8-946D-94C5A32FA6C1} - http://67.15.101.3/g_bin/eng/billard8_2_0_0_31.cab
O16 - DPF: {FDDBE2B8-6602-4AD8-946D-94C5A32FA6C5} - http://67.15.101.3/g_bin/eng/snooker_2_0_0_31.cab
O18 - Protocol: linkscanner - {F274614C-63F8-47D5-A4D1-FBDDE494F8D1} - (no file)
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\FILECO~1\Skype\SKYPE4~1.DLL
O20 - AppInit_DLLs: C:\WINDOWS\System32\dbgeng32.dll
O20 - Winlogon Notify: f423d1ba583 - C:\WINDOWS\System32\dbgeng32.dll (file missing)
O20 - Winlogon Notify: __c0060BA9 - C:\WINDOWS\
O21 - SSODL: sqPIftjYG - {F423D1BB-5E89-7B11-C397-8166C3A7EBAF} - (no file)
O23 - Service: Ad-Aware 2007 Service (aawservice) - Lavasoft - C:\Programmi\Lavasoft\Ad-Aware 2007\aawservice.exe
O23 - Service: Autodesk Licensing Service - Autodesk - C:\Programmi\File comuni\Autodesk Shared\Service\AdskScSrv.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Programmi\File comuni\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: iPod Service - Apple Inc. - C:\Programmi\iPod\bin\iPodService.exe
O23 - Service: ForceWare IP service (nSvcIp) - Unknown owner - C:\Programmi\NVIDIA Corporation\NetworkAccessManager\bin\nSvcIp.exe