Pc qui rame

Bonjour,

Mon copain trouve que son pc rame. Il est nettoyé régulièrement.
Je met le log de Hijackthis :

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 11:59:29, on 09/12/2009
Platform: Windows Vista SP2 (WinNT 6.00.1906)
MSIE: Internet Explorer v8.00 (8.00.6001.18828)
Boot mode: Normal

Running processes:
C:\Windows\system32\taskeng.exe
C:\Windows\system32\Dwm.exe
C:\Windows\Explorer.EXE
C:\Program Files\Windows Defender\MSASCui.exe
C:\Windows\RtHDVCpl.exe
C:\Program Files\PACKARD BELL\SetUpMyPC\SmpSys.exe
C:\ACER\Preload\Autorun\DRV\FUJI Keyboard\ABoard.exe
C:\Windows\vsnp2uvc.exe
C:\Windows\tsnp2uvc.exe
C:\Program Files\Avira\AntiVir Desktop\avgnt.exe
C:\ACER\Preload\Autorun\DRV\FUJI Keyboard\AOSD.exe
C:\Program Files\Java\jre6\bin\jusched.exe
C:\Users\sébastien\Downloads\utorrent.exe
C:\Windows\ehome\ehtray.exe
C:\Program Files\Common Files\Nero\Lib\NMIndexStoreSvr.exe
C:\Users\sébastien\AppData\Roaming\Microsoft\Notification de cadeaux MSN\lsnfier.exe
C:\Windows\ehome\ehmsas.exe
C:\Windows\system32\wbem\unsecapp.exe
C:\Program Files\Windows Media Player\WMPNSCFG.exe
C:\Users\sébastien\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\sébastien\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Windows\system32\SearchFilterHost.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.cherche.us
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://www.cherche.us/keyword/
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://www.cherche.us
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://www.cherche.us
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.sfr.fr/fr/adsl.jsp
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://homepage.packardbell.com/...
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://search.shareware.pro/?lang=fr
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://search.shareware.pro/?lang=fr
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = http://www.cherche.us/keyword/%s
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page_bak = http://www.cherche.us
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
R3 - URLSearchHook: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
F2 - REG:system.ini: UserInit=C:\Windows\system32\userinit.exe
O1 - Hosts: ::1 localhost
O2 - BHO: &Yahoo! Toolbar Helper - {02478D38-C3F9-4efb-9B51-7695ECA05670} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: MediaBar - {0974BA1E-64EC-11DE-B2A5-E43756D89593} - (no file)
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: MediaBar - {7B840956-64ED-11DE-B890-694956D89593} - (no file)
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O2 - BHO: SingleInstance Class - {FDAD4DA1-61A2-4FD8-9C17-86F7AC245081} - C:\Program Files\Yahoo!\Companion\Installs\cpn\YTSingleInstance.dll
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O3 - Toolbar: (no name) - {0974BA1E-64EC-11DE-B2A5-E43756D89593} - (no file)
O3 - Toolbar: (no name) - {7B840956-64ED-11DE-B890-694956D89593} - (no file)
O4 - HKLM\..\Run: [Windows Defender] %ProgramFiles%\Windows Defender\MSASCui.exe -hide
O4 - HKLM\..\Run: [RtHDVCpl] RtHDVCpl.exe
O4 - HKLM\..\Run: [SmpcSys] C:\Program Files\Packard Bell\SetupMyPC\SmpSys.exe
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\Windows\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [FujiKeyboard] c:\Acer\Preload\Autorun\DRV\FUJI Keyboard\ABoard.exe
O4 - HKLM\..\Run: [snp2uvc] C:\Windows\vsnp2uvc.exe
O4 - HKLM\..\Run: [tsnp2uvc] C:\Windows\tsnp2uvc.exe
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\Avira\AntiVir Desktop\avgnt.exe" /min
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: [SunJavaUpdateSched] "C:\Program Files\Java\jre6\bin\jusched.exe"
O4 - HKCU\..\Run: [SmpcSys] C:\Program Files\PACKARD BELL\SetUpMyPC\SmpSys.exe
O4 - HKCU\..\Run: [uTorrent] "C:\Users\sébastien\Downloads\utorrent.exe"
O4 - HKCU\..\Run: [Google Update] "C:\Users\sébastien\AppData\Local\Google\Update\GoogleUpdate.exe" /c
O4 - HKCU\..\Run: [ehTray.exe] C:\Windows\ehome\ehTray.exe
O4 - HKCU\..\Run: [IndxStoreSvr_{79662E04-7C6C-4d9f-84C7-88D8A56B10AA}] "C:\Program Files\Common Files\Nero\Lib\NMIndexStoreSvr.exe" ASO-616B5711-6DAE-4795-A05F-39A1E5104020
O4 - HKCU\..\Run: [Skype] "C:\Program Files\Skype\Phone\Skype.exe" /nosplash /minimized
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 - Startup: Notification de cadeaux MSN.lnk = ?
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O9 - Extra button: Envoyer à OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra 'Tools' menuitem: &Envoyer à OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\Office12\REFIEBAR.DLL
O9 - Extra button: Allocam Multi Vision - {2D6B57BF-71FA-41A3-BDC5-3B5A25813D2E} - (no file) (HKCU)
O9 - Extra 'Tools' menuitem: Allocam Multi Vision - {2D6B57BF-71FA-41A3-BDC5-3B5A25813D2E} - (no file) (HKCU)
O13 - Gopher Prefix:
O15 - Trusted Zone: *.chat-land.org
O16 - DPF: {2357B3CF-7F8D-4451-8D81-FD6097610AEE} - http://activex.camfrogweb.com/...
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\COMMON~1\Skype\SKYPE4~1.DLL
O23 - Service: Adobe Active File Monitor V6 (AdobeActiveFileMonitor6.0) - Unknown owner - C:\Program Files\Adobe\Photoshop Elements 6.0\PhotoshopElementsFileAgent.exe
O23 - Service: Avira AntiVir Planificateur (AntiVirSchedulerService) - Avira GmbH - C:\Program Files\Avira\AntiVir Desktop\sched.exe
O23 - Service: Avira AntiVir Guard (AntiVirService) - Avira GmbH - C:\Program Files\Avira\AntiVir Desktop\avguard.exe
O23 - Service: Service Bonjour (Bonjour Service) - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: Empowering Technology Service (ETService) - Unknown owner - C:\Program Files\Packard Bell\Packard Bell Recovery Management\Service\ETService.exe
O23 - Service: FLEXnet Licensing Service - Macrovision Europe Ltd. - C:\Program Files\Common Files\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: Generic Service for HID Keyboard Input Collections (GenericHidService) - Packard Bell Services - c:\windows\system32\HidService.exe
O23 - Service: Nero BackItUp Scheduler 3 - Nero AG - C:\Program Files\Nero\Nero8\Nero BackItUp\NBService.exe
O23 - Service: NMIndexingService - Nero AG - C:\Program Files\Common Files\Nero\Lib\NMIndexingService.exe
O23 - Service: Norton Internet Security - Unknown owner - C:\Program Files\Norton Internet Security\Engine\16.0.0.125\ccSvcHst.exe (file missing)
O23 - Service: NVIDIA Display Driver Service (nvsvc) - NVIDIA Corporation - C:\Windows\system32\nvvsvc.exe
O23 - Service: PLFlash DeviceIoControl Service - Prolific Technology Inc. - C:\Windows\system32\IoctlSvc.exe