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Merci de la réponse rapide, voici le résultat du scan :

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 15:16:48, on 20/01/2013
Platform: Windows Vista SP1 (WinNT 6.00.1905)
MSIE: Internet Explorer v7.00 (7.00.6001.18000)
Boot mode: Normal

Running processes:
C:\Windows\system32\Dwm.exe
C:\Windows\system32\taskeng.exe
C:\Windows\Explorer.EXE
C:\Windows\RtHDVCpl.exe
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\Program Files\Toshiba\ConfigFree\NDSTray.exe
C:\Program Files\Toshiba\Power Saver\TPwrMain.exe
C:\Program Files\Toshiba\SmoothView\SmoothView.exe
C:\Program Files\Toshiba\FlashCards\TCrdMain.exe
C:\Program Files\Avira\AntiVir Desktop\avgnt.exe
C:\Program Files\Common Files\Research In Motion\USB Drivers\RIMBBLaunchAgent.exe
C:\Program Files\Common Files\Java\Java Update\jusched.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\Program Files\Toshiba\TOSCDSPD\TOSCDSPD.exe
C:\Program Files\ltmoh\ltmoh.exe
C:\Users\Cédric\AppData\Roaming\Spotify\Data\SpotifyWebHelper.exe
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\MOM.EXE
C:\Program Files\Toshiba\ConfigFree\CFSwMgr.exe
C:\Program Files\Synaptics\SynTP\SynTPHelper.exe
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\CCC.exe
C:\Program Files\Common Files\Java\Java Update\jusched.exe
C:\Program Files\Common Files\Java\Java Update\jusched.exe
C:\Windows\system32\taskeng.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Mozilla Firefox\plugin-container.exe
C:\Windows\system32\Macromed\Flash\FlashPlayerPlugin_11_5_502_146.exe
C:\Windows\system32\Macromed\Flash\FlashPlayerPlugin_11_5_502_146.exe
C:\Program Files\uTorrent\uTorrent.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.google.fr
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.claro-search.com/?affID=116198&tt=4112_7&babsrc=HP_ss&mntrId=2a465afd000000000000001f3caf62a5
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.google.fr
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 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
O1 - Hosts: ::1 localhost
O2 - BHO: CrossriderApp0004479 - {11111111-1111-1111-1111-110011441179} - C:\Program Files\Giant Savings\Giant Savings.dll
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: Babylon toolbar helper - {2EECD738-5844-4a99-B4B6-146BF802613B} - C:\Program Files\BabylonToolbar\BabylonToolbar\1.6.9.12\bh\BabylonToolbar.dll
O2 - BHO: Java(tm) Plug-In SSV Helper - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre7\bin\ssv.dll
O2 - BHO: SkypeIEPluginBHO - {AE805869-2E5C-4ED4-8F7B-F1F7851A4497} - C:\Program Files\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre7\bin\jp2ssv.dll
O3 - Toolbar: Babylon Toolbar - {98889811-442D-49dd-99D7-DC866BE87DBC} - C:\Program Files\BabylonToolbar\BabylonToolbar\1.6.9.12\BabylonToolbarTlbr.dll
O4 - HKLM\..\Run: [Windows Defender] %ProgramFiles%\Windows Defender\MSASCui.exe -hide
O4 - HKLM\..\Run: [RtHDVCpl] RtHDVCpl.exe
O4 - HKLM\..\Run: [SynTPEnh] C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [NDSTray.exe] NDSTray.exe
O4 - HKLM\..\Run: [StartCCC] "C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\CLIStart.exe"
O4 - HKLM\..\Run: [Camera Assistant Software] "C:\Program Files\Camera Assistant Software for Toshiba\traybar.exe" /start
O4 - HKLM\..\Run: [TPwrMain] %ProgramFiles%\TOSHIBA\Power Saver\TPwrMain.EXE
O4 - HKLM\..\Run: [HSON] %ProgramFiles%\TOSHIBA\TBS\HSON.exe
O4 - HKLM\..\Run: [SmoothView] %ProgramFiles%\Toshiba\SmoothView\SmoothView.exe
O4 - HKLM\..\Run: [00TCrdMain] %ProgramFiles%\TOSHIBA\FlashCards\TCrdMain.exe
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\Avira\AntiVir Desktop\avgnt.exe" /min
O4 - HKLM\..\Run: [RIMBBLaunchAgent.exe] C:\Program Files\Common Files\Research In Motion\USB Drivers\RIMBBLaunchAgent.exe
O4 - HKLM\..\Run: [WinampAgent] "C:\Program Files\Winamp\winampa.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Common Files\Java\Java Update\jusched.exe"
O4 - HKLM\..\Run: [APSDaemon] "C:\Program Files\Common Files\Apple\Apple Application Support\APSDaemon.exe"
O4 - HKLM\..\Run: [LogMeIn Hamachi Ui] "C:\Program Files\LogMeIn Hamachi\hamachi-2-ui.exe" --auto-start
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [Adobe ARM] "C:\Program Files\Common Files\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKCU\..\Run: [TOSCDSPD] C:\Program Files\TOSHIBA\TOSCDSPD\TOSCDSPD.exe
O4 - HKCU\..\Run: [LtMoh] C:\Program Files\ltmoh\Ltmoh.exe
O4 - HKCU\..\Run: [Skype] "C:\Program Files\Skype\Phone\Skype.exe" /minimized /regrun
O4 - HKCU\..\Run: [Spotify] "C:\Users\Cédric\AppData\Roaming\Spotify\Spotify.exe" /uri spotify:autostart
O4 - HKCU\..\Run: [Spotify Web Helper] "C:\Users\Cédric\AppData\Roaming\Spotify\Data\SpotifyWebHelper.exe"
O4 - HKCU\..\Run: [DAEMON Tools Lite] "C:\Program Files\DAEMON Tools Lite\DTLite.exe" -autorun
O4 - HKCU\..\Run: [Sony PC Companion] "C:\Program Files\Sony\Sony PC Companion\PCCompanion.exe" /Background
O4 - HKUS\S-1-5-19\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /detectMem (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-19\..\Run: [WindowsWelcomeCenter] rundll32.exe oobefldr.dll,ShowWelcomeCenter (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /detectMem (User 'SERVICE RÉSEAU')
O4 - .DEFAULT User Startup: TRDCReminder.lnk = C:\Program Files\Toshiba\TRDCReminder\TRDCReminder.exe (User 'Default user')
O4 - Startup: OpenOffice.org 3.4.1.lnk = C:\Program Files\OpenOffice.org 3\program\quickstart.exe
O4 - Startup: TRDCReminder.lnk = C:\Program Files\Toshiba\TRDCReminder\TRDCReminder.exe
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~3\Office12\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre7\bin\jp2iexp.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre7\bin\jp2iexp.dll
O9 - Extra button: Envoyer à OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~3\Office12\ONBttnIE.dll
O9 - Extra 'Tools' menuitem: &Envoyer à OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~3\Office12\ONBttnIE.dll
O9 - Extra button: eBay - Achetez, Vendez - {76577871-04EC-495E-A12B-91F7C3600AFA} - http://rover.ebay.com/rover/1/709-44555-9400-3/4 (file missing)
O9 - Extra button: Skype Click to Call - {898EA8C8-E7FF-479B-8935-AEC46303B9E5} - C:\Program Files\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O9 - Extra button: Amazon.fr - {8A918C1D-E123-4E36-B562-5C1519E434CE} - http://www.amazon.fr/exec/obidos/redirect-home?tag=Toshibafrbholink-21&site=home (file missing)
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~3\Office12\REFIEBAR.DLL
O13 - Gopher Prefix:
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - https://fpdownload.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O18 - Protocol: skype-ie-addon-data - {91774881-D725-4E58-B298-07617B9B86A8} - C:\Program Files\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\COMMON~1\Skype\SKYPE4~1.DLL
O23 - Service: Adobe Acrobat Update Service (AdobeARMservice) - Adobe Systems Incorporated - C:\Program Files\Common Files\Adobe\ARM\1.0\armsvc.exe
O23 - Service: Adobe Flash Player Update Service (AdobeFlashPlayerUpdateSvc) - Adobe Systems Incorporated - C:\Windows\system32\Macromed\Flash\FlashPlayerUpdateService.exe
O23 - Service: Agere Modem Call Progress Audio (AgereModemAudio) - Agere Systems - C:\Windows\system32\agrsmsvc.exe
O23 - Service: Avira Planificateur (AntiVirSchedulerService) - Avira Operations GmbH & Co. KG - C:\Program Files\Avira\AntiVir Desktop\sched.exe
O23 - Service: Avira Protection temps réel (AntiVirService) - Avira Operations GmbH & Co. KG - C:\Program Files\Avira\AntiVir Desktop\avguard.exe
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files\Common Files\Apple\Mobile Device Support\AppleMobileDeviceService.exe
O23 - Service: Ati External Event Utility - ATI Technologies Inc. - C:\Windows\system32\Ati2evxx.exe
O23 - Service: Service Bonjour (Bonjour Service) - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: ConfigFree Service - TOSHIBA CORPORATION - C:\Program Files\TOSHIBA\ConfigFree\CFSvcs.exe
O23 - Service: LogMeIn Hamachi Tunneling Engine (Hamachi2Svc) - LogMeIn Inc. - C:\Program Files\LogMeIn Hamachi\hamachi-2.exe
O23 - Service: Service de l'iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: Mozilla Maintenance Service (MozillaMaintenance) - Mozilla Foundation - C:\Program Files\Mozilla Maintenance Service\maintenanceservice.exe
O23 - Service: Skype C2C Service - Skype Technologies S.A. - C:\ProgramData\Skype\Toolbars\Skype C2C Service\c2c_service.exe
O23 - Service: Skype Updater (SkypeUpdate) - Skype Technologies - C:\Program Files\Skype\Updater\Updater.exe
O23 - Service: Sony PC Companion - Avanquest Software - C:\Program Files\Sony\Sony PC Companion\PCCService.exe
O23 - Service: TOSHIBA Navi Support Service (TNaviSrv) - TOSHIBA Corporation - C:\Program Files\Toshiba\TOSHIBA DVD PLAYER\TNaviSrv.exe
O23 - Service: TOSHIBA Optical Disc Drive Service (TODDSrv) - TOSHIBA Corporation - C:\Windows\system32\TODDSrv.exe
O23 - Service: TOSHIBA Power Saver (TosCoSrv) - TOSHIBA Corporation - C:\Program Files\Toshiba\Power Saver\TosCoSrv.exe
O23 - Service: TOSHIBA Bluetooth Service - Unknown owner - c:\Program Files\Toshiba\Bluetooth Toshiba Stack\TosBtSrv.exe (file missing)
O23 - Service: TOSHIBA SMART Log Service - TOSHIBA Corporation - C:\Program Files\TOSHIBA\SMARTLogService\TosIPCSrv.exe
O23 - Service: Ulead Burning Helper (UleadBurningHelper) - Ulead Systems, Inc. - C:\Program Files\Common Files\Ulead Systems\DVD\ULCDRSvr.exe