Cheval de troie (hijackthis)

Bonjour, mon ordi a dectecté un cheval de trois je n'arrive pas a le suprimé avec avast qui me dit que l'operation est impossible
voici le raport de Hijacktis avec ma configuration de mon pc et la version de mon moteur de recherche .Merci de m'aider !!!

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 21:06:36, on 24/09/2010
Platform: Windows Vista (WinNT 6.00.1904)
MSIE: Internet Explorer v8.00 (8.00.6001.18904)
Boot mode: Normal

Running processes:
C:\Windows\system32\Dwm.exe
C:\Windows\Explorer.EXE
C:\Windows\system32\taskeng.exe
C:\Program Files\Windows Defender\MSASCui.exe
C:\Windows\System32\rundll32.exe
C:\Program Files\Common Files\Java\Java Update\jusched.exe
C:\Program Files\OrangeHSS\Systray\SystrayApp.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\Program Files\Common Files\Adobe\ARM\1.0\AdobeARM.exe
C:\Program Files\Alwil Software\Avast4\ashDisp.exe
C:\Program Files\Windows Sidebar\sidebar.exe
C:\Program Files\Windows Live\Messenger\msnmsgr.exe
C:\Program Files\Windows Media Player\wmpnscfg.exe
C:\Program Files\Samsung\Samsung New PC Studio\NPSAgent.exe
C:\Program Files\uTorrent\uTorrent.exe
C:\Program Files\DAEMON Tools Lite\DTLite.exe
C:\Program Files\OpenOffice.org 3\program\soffice.exe
C:\Program Files\OpenOffice.org 3\program\soffice.bin
C:\PROGRA~1\COMMON~1\France Telecom\Shared Modules\AlertModule\0\AlertModule.exe
C:\Program Files\Windows Sidebar\sidebar.exe
C:\Windows\system32\wuauclt.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Users\nivet\Documents\Downloads\HiJackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://www.tangosearch.com/?useie5=1&q=
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://search.shareware.pro/?lang=fr
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://y.lo.st
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 Bar = http://www.tangosearch.com/?useie5=1&q=
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://search.shareware.pro/?lang=fr
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\Internet Explorer\Main,First Home Page = http://y.lo.st
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
R3 - URLSearchHook: UrlSearchHook Class - {00000000-6E41-4FD3-8538-502F5495E5FC} - C:\Program Files\Ask.com\GenericAskToolbar.dll (file missing)
R3 - URLSearchHook: Search Class - {08C06D61-F1F3-4799-86F8-BE1A89362C85} - C:\Program Files\OrangeHSS\SearchURLHook\SearchPageURL.dll
R3 - URLSearchHook: Vuze Remote Toolbar - {ba14329e-9550-4989-b3f2-9732e92d17cc} - C:\Program Files\Vuze_Remote\tbVuze.dll (file missing)
O1 - Hosts: ::1 localhost
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: Programme d'aide de l'Assistant de connexion Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Vuze Remote Toolbar - {ba14329e-9550-4989-b3f2-9732e92d17cc} - C:\Program Files\Vuze_Remote\tbVuze.dll (file missing)
O2 - BHO: Ask Toolbar BHO - {D4027C7F-154A-4066-A1AD-4243D8127440} - C:\Program Files\Ask.com\GenericAskToolbar.dll (file missing)
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O3 - Toolbar: LimeWire Toolbar - {D4027C7F-154A-4066-A1AD-4243D8127440} - C:\Program Files\Ask.com\GenericAskToolbar.dll (file missing)
O3 - Toolbar: Vuze Remote Toolbar - {ba14329e-9550-4989-b3f2-9732e92d17cc} - C:\Program Files\Vuze_Remote\tbVuze.dll (file missing)
O4 - HKLM\..\Run: [Windows Defender] %ProgramFiles%\Windows Defender\MSASCui.exe -hide
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\Windows\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [NVHotkey] rundll32.exe C:\Windows\system32\nvHotkey.dll,Start
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Common Files\Java\Java Update\jusched.exe"
O4 - HKLM\..\Run: [SystrayORAHSS] "C:\Program Files\OrangeHSS\Systray\SystrayApp.exe"
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [Adobe ARM] "C:\Program Files\Common Files\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [OEM02Mon.exe] C:\Windows\OEM02Mon.exe
O4 - HKLM\..\RunOnce: [SoftwareHelper] C:\Users\nivet\AppData\Roaming\EoRezo\SoftwareUpdate\SoftwareUpdateHP.exe -runonce
O4 - HKCU\..\Run: [Sidebar] C:\Program Files\Windows Sidebar\sidebar.exe /autoRun
O4 - HKCU\..\Run: [msnmsgr] "C:\Program Files\Windows Live\Messenger\msnmsgr.exe" /background
O4 - HKCU\..\Run: [WMPNSCFG] C:\Program Files\Windows Media Player\WMPNSCFG.exe
O4 - HKCU\..\Run: [AutoStartNPSAgent] C:\Program Files\Samsung\Samsung New PC Studio\NPSAgent.exe
O4 - HKCU\..\Run: [uTorrent] "C:\Program Files\uTorrent\uTorrent.exe"
O4 - HKCU\..\Run: [DAEMON Tools Lite] "C:\Program Files\DAEMON Tools Lite\DTLite.exe" -autorun
O4 - Startup: OpenOffice.org 3.0.lnk = C:\Program Files\OpenOffice.org 3\program\quickstart.exe
O13 - Gopher Prefix:
O16 - DPF: {5D6F45B3-9043-443D-A792-115447494D24} (UnoCtrl Class) - http://messenger.zone.msn.com/...
O16 - DPF: {C3F79A2B-B9B4-4A66-B012-3EE46475B072} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab56907.cab
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O16 - DPF: {E77F23EB-E7AB-4502-8F37-247DBAF1A147} (Windows Live Hotmail Photo Upload Tool) - http://gfx1.hotmail.com/mail/w4/pr01/photouploadcontrol/VistaMSNPUpldfr-fr.cab
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
O23 - Service: Service Bonjour (Bonjour Service) - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: FsUsbExService - Teruten - C:\Windows\system32\FsUsbExService.Exe
O23 - Service: France Telecom Routing Table Service (FTRTSVC) - France Telecom SA - C:\PROGRA~1\COMMON~1\France Telecom\Shared Modules\FTRTSVC\0\FTRTSVC.exe
O23 - Service: Service Google Update (gupdate) (gupdate) - Google Inc. - C:\Program Files\Google\Update\GoogleUpdate.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: Service de l'iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: NVIDIA Display Driver Service (nvsvc) - NVIDIA Corporation - C:\Windows\system32\nvvsvc.exe
O23 - Service: PnkBstrA - Unknown owner - C:\Windows\system32\PnkBstrA.exe
O23 - Service: PnkBstrB - Unknown owner - C:\Windows\system32\PnkBstrB.exe
O23 - Service: ServiceLayer - Nokia. - C:\Program Files\PC Connectivity Solution\ServiceLayer.exe
O23 - Service: SpaceQuery Service - Unknown owner - C:\ProgramData\SpaceQuery\spacequery145.exe