Explorer me prend trop de memoire

Bonjour a tous ,

je suis nouveaux et je voudrais des conseils de votre part.
hier j'ai essayer d'installer sony vegas 7 et le truc c'est qu'une fois installer il me disait que com surrogate avait cesser de fonctionner.sa c'est pas grave, du coup j'ai supprimer sony vegas 7 mais le truc c'est que depuis que j'ai installer sa quand je lance une video avec vlc mon explorer passe de environ 25000 ko a environ 1 250 000 ko et le pc devient long tres long a reflechir. j'ai passer spybot pour voir si j'avais pas un probleme mais rien. je precise aussi que j'ai pas d'anti-virus.

si quelqu'un pouvait me filer un coup de main ce serait simpa

ps : j'ai passer hijackthis au cas ou on me le demanderait

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 10:23:26, on 29/08/2009
Platform: Windows Vista SP1 (WinNT 6.00.1905)
MSIE: Internet Explorer v8.00 (8.00.6001.18813)
Boot mode: Normal

Running processes:
C:\Windows\system32\Dwm.exe
C:\Windows\system32\taskeng.exe
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\Windows\System32\igfxtray.exe
C:\Windows\System32\hkcmd.exe
C:\Windows\System32\igfxpers.exe
C:\Program Files\HP\QuickPlay\QPService.exe
C:\Program Files\Windows Defender\MSASCui.exe
C:\Program Files\Hewlett-Packard\HP Quick Launch Buttons\QLBCTRL.exe
C:\Program Files\HP\HP Software Update\hpwuSchd2.exe
C:\Program Files\Hewlett-Packard\HP Wireless Assistant\HPWAMain.exe
C:\Program Files\Common Files\LightScribe\LightScribeControlPanel.exe
C:\Windows\system32\igfxsrvc.exe
C:\Program Files\Samsung\Samsung New PC Studio\NPSAgent.exe
C:\Program Files\Nokia\Nokia PC Suite 7\PCSuite.exe
C:\Program Files\Hewlett-Packard\HP wireless Assistant\WiFiMsg.EXE
C:\Program Files\Hewlett-Packard\Shared\HpqToaster.exe
C:\Windows\system32\Taskmgr.exe
C:\Program Files\Lavasoft\Ad-Aware\AAWTray.exe
C:\Windows\explorer.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Google\Google Toolbar\GoogleToolbarUser_32.exe
C:\Windows\system32\Macromed\Flash\FlashUtil10c.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Users\alex\Desktop\HiJackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr/?ocid=iehp
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.google.fr/?gws_rd=ssl
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr?cobrand=compaq-notebook.msn.com&ocid=HPDHP&pc=CPNTDF
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.msn.com/fr-fr?cobrand=compaq-notebook.msn.com&ocid=HPDHP&pc=CPNTDF
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: Aide pour le lien d'Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
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: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - C:\Program Files\Google\Google Toolbar\GoogleToolbar_32.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program Files\Google\GoogleToolbarNotifier\5.2.4204.1700\swg.dll
O2 - BHO: Google Dictionary Compression sdch - {C84D72FE-E17D-4195-BB24-76C02E2E7C4E} - C:\Program Files\Google\Google Toolbar\Component\fastsearch_B7C5AC242193BB3E.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O3 - Toolbar: Google Toolbar - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - C:\Program Files\Google\Google Toolbar\GoogleToolbar_32.dll
O3 - Toolbar: (no name) - {92085AD4-F48A-450D-BD93-B28CC7DF67CE} - (no file)
O4 - HKLM\..\Run: [SynTPEnh] C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [IgfxTray] C:\Windows\system32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\Windows\system32\hkcmd.exe
O4 - HKLM\..\Run: [Persistence] C:\Windows\system32\igfxpers.exe
O4 - HKLM\..\Run: [UCam_Menu] "C:\Program Files\CyberLink\YouCam\MUITransfer\MUIStartMenu.exe" "C:\Program Files\CyberLink\YouCam" update "Software\CyberLink\YouCam\2.0"
O4 - HKLM\..\Run: [QPService] "C:\Program Files\HP\QuickPlay\QPService.exe"
O4 - HKLM\..\Run: [Windows Defender] %ProgramFiles%\Windows Defender\MSASCui.exe -hide
O4 - HKLM\..\Run: [QlbCtrl.exe] C:\Program Files\Hewlett-Packard\HP Quick Launch Buttons\QlbCtrl.exe /Start
O4 - HKLM\..\Run: [HP Software Update] C:\Program Files\Hp\HP Software Update\HPWuSchd2.exe
O4 - HKLM\..\Run: [hpWirelessAssistant] C:\Program Files\Hewlett-Packard\HP Wireless Assistant\HPWAMain.exe
O4 - HKLM\..\Run: [HP Health Check Scheduler] c:\Program Files\Hewlett-Packard\HP Health Check\HPHC_Scheduler.exe
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [Ad-Watch] C:\Program Files\Lavasoft\Ad-Aware\AAWTray.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre6\bin\jusched.exe"
O4 - HKCU\..\Run: [LightScribe Control Panel] C:\Program Files\Common Files\LightScribe\LightScribeControlPanel.exe -hidden
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: [PC Suite Tray] "C:\Program Files\Nokia\Nokia PC Suite 7\PCSuite.exe" -onlytray
O4 - Startup: GigaTribe.lnk = C:\Program Files\GigaTribe\gigatribe.exe
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~3\Office12\EXCEL.EXE/3000
O8 - Extra context menu item: Recherche sur eBay - res://C:\Program Files\eBay\eBay Toolbar2\eBayTb.dll/RCSearch.html
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~3\Office12\REFIEBAR.DLL
O13 - Gopher Prefix:
O16 - DPF: {49232000-16E4-426C-A231-62846947304B} (SysData Class) - https://wimpro3.cce.hp.com/ChatEntry/downloads/sysinfo.cab
O23 - Service: Service Bonjour (Bonjour Service) - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: Com4QLBEx - Hewlett-Packard Development Company, L.P. - C:\Program Files\Hewlett-Packard\HP Quick Launch Buttons\Com4QLBEx.exe
O23 - Service: FsUsbExService - Teruten - C:\Windows\system32\FsUsbExService.Exe
O23 - Service: GameConsoleService - WildTangent, Inc. - C:\Program Files\HP Games\My HP Game Console\GameConsoleService.exe
O23 - Service: Google Software Updater (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: HP Health Check Service - Hewlett-Packard - c:\Program Files\Hewlett-Packard\HP Health Check\hphc_service.exe
O23 - Service: hpqwmiex - Hewlett-Packard Development Company, L.P. - C:\Program Files\Hewlett-Packard\Shared\hpqwmiex.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\1050\Intel 32\IDriverT.exe
O23 - Service: Lavasoft Ad-Aware Service - Lavasoft - C:\Program Files\Lavasoft\Ad-Aware\AAWService.exe
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Hewlett-Packard Company - C:\Program Files\Common Files\LightScribe\LSSrvc.exe
O23 - Service: Recovery Service for Windows - Unknown owner - C:\Windows\SMINST\BLService.exe
O23 - Service: Cyberlink RichVideo Service(CRVS) (RichVideo) - Unknown owner - C:\Program Files\CyberLink\Shared Files\RichVideo.exe
O23 - Service: ServiceLayer - Nokia. - C:\Program Files\PC Connectivity Solution\ServiceLayer.exe
O23 - Service: @%SystemRoot%\System32\TuneUpDefragService.exe,-1 (TuneUp.Defrag) - TuneUp Software GmbH - C:\Windows\System32\TuneUpDefragService.exe
O23 - Service: XAudioService - Conexant Systems, Inc. - C:\Windows\system32\DRIVERS\xaudio.exe