Bonjour,
Depuis quelques temps je constate des problèmes de lenteur de mon portable qui jusqu'alors fonctionnait bien.
A titre d'exemple le lancement de l'explorateur (explorer.exe) prend 3 seconde et sa fermeture près de 5 seconde ...

Je vous joins le rapport d'HijackThis pour savoir si quelqu'un trouve une explication ?

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Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 20:50:22, on 16/11/2009
Platform: Windows Vista SP2 (WinNT 6.00.1906)
MSIE: Internet Explorer v7.00 (7.00.6002.18005)
Boot mode: Normal

Running processes:
C:\Windows\system32\taskeng.exe
C:\Windows\system32\Dwm.exe
C:\Windows\Explorer.EXE
C:\Program Files\ASUS\SmartLogon\sensorsrv.exe
C:\Program Files\ASUS\ASUS CopyProtect\aspg.exe
C:\Program Files\ASUS\ASUS Live Update\ALU.exe
C:\Program Files\CyberLink\Power2Go\CLMLSvc.exe
C:\Program Files\ASUS\ATK Hotkey\HControlUser.exe
C:\Program Files\ASUS\ATKOSD2\ATKOSD2.exe
C:\Windows\RtHDVCpl.exe
C:\Program Files\ASUS\ATK Media\DMedia.exe
C:\Windows\AsScrPro.exe
C:\Windows\WindowsMobile\wmdc.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2010\avp.exe
C:\Program Files\HP\HP Software Update\hpwuSchd2.exe
C:\Program Files\Java\jre6\bin\jusched.exe
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\Windows\ehome\ehtray.exe
C:\Program Files\WIDCOMM\Bluetooth Software\BTTray.exe
C:\Windows\ehome\ehmsas.exe
C:\Program Files\Windows Media Player\wmpnscfg.exe
C:\Program Files\Synaptics\SynTP\SynTPHelper.exe
C:\Users\Christophe\AppData\Local\Google\Chrome\Application\­chrome.exe
C:\Users\Christophe\AppData\Local\Google\Chrome\Application\­chrome.exe
C:\Users\Christophe\AppData\Local\Google\Chrome\Application\­chrome.exe
C:\Users\Christophe\AppData\Local\Google\Chrome\Application\­chrome.exe
C:\Users\Christophe\AppData\Local\Google\Chrome\Application\­chrome.exe
C:\Users\Christophe\AppData\Local\Google\Chrome\Application\­chrome.exe
C:\Windows\system32\taskmgr.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
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\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: IEVkbdBHO - {59273AB4-E7D3-40F9-A1A8-6FA9CCA1862C} - C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2010\ievkbd.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O2 - BHO: link filter bho - {E33CF602-D945-461A-83F0-819F76A199F8} - C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2010\klwtbbho.dll
O4 - HKLM\..\Run: [CLMLServer] "C:\Program Files\CyberLink\Power2Go\CLMLSvc.exe"
O4 - HKLM\..\Run: [P2Go_Menu] "C:\Program Files\CyberLink\Power2Go\MUITransfer\MUIStartMenu.exe" "C:\Program Files\CyberLink\Power2Go" UpdateWithCreateOnce "SOFTWARE\CyberLink\Power2Go\6.0"
O4 - HKLM\..\Run: [HControlUser] C:\Program Files\ASUS\ATK Hotkey\HControlUser.exe
O4 - HKLM\..\Run: [ATKOSD2] C:\Program Files\ASUS\ATKOSD2\ATKOSD2.exe
O4 - HKLM\..\Run: [RtHDVCpl] RtHDVCpl.exe
O4 - HKLM\..\Run: [ATKMEDIA] C:\Program Files\ASUS\ATK Media\DMEDIA.EXE
O4 - HKLM\..\Run: [ASUS Screen Saver Protector] C:\Windows\AsScrPro.exe
O4 - HKLM\..\Run: [ASUS Camera ScreenSaver] C:\Windows\AsScrProlog.exe
O4 - HKLM\..\Run: [HomePlayer] C:\Program Files\HomePlayer\HomePlayer.exe
O4 - HKLM\..\Run: [Windows Mobile Device Center] %windir%\WindowsMobile\wmdc.exe
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [avp] "C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2010\avp.exe"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [HP Software Update] C:\Program Files\HP\HP Software Update\HPWuSchd2.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre6\bin\jusched.exe"
O4 - HKLM\..\Run: [SynTPEnh] C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [Windows Defender] %ProgramFiles%\Windows Defender\MSASCui.exe -hide
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\Windows\system32\NvCpl.dll,NvStartup
O4 - HKCU\..\Run: [LightScribe Control Panel] C:\Program Files\Common Files\LightScribe\LightScribeControlPanel.exe -hidden
O4 - HKCU\..\Run: [ehTray.exe] C:\Windows\ehome\ehTray.exe
O4 - HKCU\..\Run: [Google Update] "C:\Users\Christophe\AppData\Local\Google\Update\GoogleUpdate.exe" /c
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 - Global Startup: Adobe Gamma Loader.lnk = ?
O4 - Global Startup: Bluetooth.lnk = ?
O8 - Extra context menu item: Add to Google Photos Screensa&ver - res://C:\Windows\system32\GPhotos.scr/200
O8 - Extra context menu item: Ajouter à l'Anti-bannière - C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2010\ie_banner_deny.htm
O9 - Extra button: Clavier &virtuel - {4248FE82-7FCB-46AC-B270-339F08212110} - C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2010\klwtbbho.dll
O9 - Extra button: Analyse des &liens - {CCF151D8-D089-449F-A5A4-D9909053F20F} - C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2010\klwtbbho.dll
O13 - Gopher Prefix:
O17 - HKLM\System\CCS\Services\Tcpip\..\{8E1ED78B-64AE-473D-8073-6AED841879F4}: NameServer = 212.27.40.241,212.27.40.240
O20 - AppInit_DLLs: C:\PROGRA~1\KASPER~1\KASPER~2\mzvkbd3.dll,C:\PROGRA~1\KASPER~1\KASPER~2\kloehk.dll
O23 - Service: ADSM Service (ADSMService) - Unknown owner - C:\Program Files\ASUS\ASUS Data Security Manager\ADSMSrv.exe
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: ASLDR Service (ASLDRService) - Unknown owner - C:\Program Files\ASUS\ATK Hotkey\ASLDRSrv.exe
O23 - Service: ATKGFNEX Service (ATKGFNEXSrv) - Unknown owner - C:\Program Files\ATKGFNEX\GFNEXSrv.exe
O23 - Service: Kaspersky Internet Security (AVP) - Kaspersky Lab - C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2010\avp.exe
O23 - Service: Service Bonjour (Bonjour Service) - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: Bluetooth Service (btwdins) - Broadcom Corporation. - C:\Program Files\WIDCOMM\Bluetooth Software\bin\btwdins.exe
O23 - Service: Google Update Service (gupdate1c9862f4e6cae20) (gupdate1c9862f4e6cae20) - Google Inc. - C:\Program Files\Google\Update\GoogleUpdate.exe
O23 - Service: Google Software Updater (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\1150\Intel 32\IDriverT.exe
O23 - Service: Service de l’iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: Lavasoft Ad-Aware Service - Lavasoft - C:\Program Files\Lavasoft\Ad-Aware\AAWService.exe
O23 - Service: NVIDIA Display Driver Service (nvsvc) - NVIDIA Corporation - C:\Windows\system32\nvvsvc.exe
O23 - Service: spmgr - Unknown owner - C:\Program Files\ASUS\NB Probe\SPM\spmgr.exe
End of file - 7636 bytes

Configuration: Windows Vista
Safari 532.0