Problèmes pubs. intempestives

Bonjour,

j'ai un soucis avec mon ordinateur lorsque je navigue sur internet.
En effet, après avoir cliqué sur un lien que l'on m'a envoyé par mail, des fenêtres intempestives s'ouvrent régulièrement. Elles sont en générales de deux sortes : soit une fenetre de chat ou une fenetre me disant que mon PC est infecté de virus et qu'un scan est nécessaire.
De plus lorsque je fais une recherche sur google et que je clique sur le lien, ce dernier me renvois sur la page d'accueil de Google.

Pourriez-vous m'aidé ?

merci

Voici un log Hijackthis que je viens de faire :
--
Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 14:42:55, on 28/06/2009
Platform: Windows Vista (WinNT 6.00.1904)
MSIE: Internet Explorer v7.00 (7.00.6000.16830)
Boot mode: Normal

Running processes:
C:\Windows\system32\taskeng.exe
C:\Windows\system32\Dwm.exe
C:\Windows\Explorer.EXE
C:\Windows\System32\TpShocks.exe
C:\Program Files\Common Files\Lenovo\Scheduler\scheduler_proxy.exe
C:\Program Files\ThinkPad\ConnectUtilities\ACWLIcon.exe
C:\Program Files\McAfee\VirusScan Enterprise\shstat.exe
C:\Program Files\McAfee\Common Framework\UdaterUI.exe
C:\Program Files\Windows Defender\MSASCui.exe
C:\Program Files\ThinkVantage\PrdCtr\LPMGR.EXE
C:\Program Files\ThinkVantage\PrdCtr\LPMLCHK.EXE
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\Program Files\ThinkPad\Utilities\EZEJMNAP.EXE
C:\Program Files\Lenovo\Client Security Solution\cssauth.exe
C:\Program Files\Lenovo\NPDIRECT\tpfnf7sp.exe
C:\Windows\System32\rundll32.exe
C:\Program Files\Analog Devices\Core\smax4pnp.exe
C:\Windows\tsnp2std.exe
C:\Windows\vsnp2std.exe
C:\Program Files\Intel\Intel Matrix Storage Manager\IAAnotif.exe
C:\Windows\System32\rundll32.exe
C:\Program Files\Lenovo\Message Center Plus\MCPLaunch.exe
C:\Program Files\McAfee\Common Framework\McTray.exe
C:\Program Files\ThinkPad\ConnectUtilities\ACTray.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\Users\J.Ben.DE-PEDAGOGIE\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Program Files\Synaptics\SynTP\SynTPLpr.exe
C:\Users\J.Ben.DE-PEDAGOGIE\AppData\Local\Google\Update\GoogleUpdate.exe
C:\Program Files\Windows Sidebar\sidebar.exe
C:\Program Files\ThinkPad\Bluetooth Software\BTTray.exe
C:\Program Files\Digital Line Detect\DLG.exe
C:\Program Files\Microsoft Firewall Client 2004\FwcMgmt.exe
C:\Program Files\Windows Sidebar\sidebar.exe
C:\Users\J.Ben.DE-PEDAGOGIE\AppData\Local\Google\Chrome\Application\chrome.exe
C:\PROGRA~1\ThinkPad\UTILIT~1\PWMUIAux.exe
C:\Users\J.Ben-zakoun.DE-PEDAGOGIE\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\J.Ben-zakoun.DE-PEDAGOGIE\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
C:\Program Files\Microsoft Office\Office12\WINWORD.EXE
C:\Program Files\Windows Live\Mail\wlmail.exe
C:\Users\J.Ben.DE-PEDAGOGIE\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\J.Ben.DE-PEDAGOGIE\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Program Files\Microsoft\Office Live\OfficeLiveSignIn.exe
C:\Users\J.Ben.DE-PEDAGOGIE\AppData\Local\Google\Google Talk Plugin\googletalkplugin.exe
C:\Program Files\Windows Live\Contacts\wlcomm.exe
C:\Users\J.Ben.DE-PEDAGOGIE\AppData\Local\Google\Chrome\Application\chrome.exe
C:\Users\J.Ben.DE-PEDAGOGIE\AppData\Local\Google\Chrome\Application\chrome.exe
D:\Utilisateur\Documents\Downloads\hijackthis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr/?redirfallthru=http%3a%2f%2flenovo.live.com%2f%3f
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr/?redirfallthru=http%3a%2f%2flenovo.live.com%2f%3f
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/?ocid=iehp
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: Skype add-on (mastermind) - {22BF413B-C6D2-4d91-82A9-A0F997BA588C} - C:\Program Files\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.dll
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: scriptproxy - {7DB2D5A0-7241-4E79-B68D-6309F01C5231} - C:\Program Files\McAfee\VirusScan Enterprise\scriptcl.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.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program Files\Google\GoogleToolbarNotifier\5.1.1309.15642\swg.dll
O2 - BHO: Password Manager Browser Helper Object - {BF468356-BB7E-42D7-9F15-4F3B9BCFCED2} - C:\Program Files\Lenovo\Client Security Solution\tvtpwm_ie_com.dll
O2 - BHO: Google Dictionary Compression sdch - {C84D72FE-E17D-4195-BB24-76C02E2E7C4E} - C:\Program Files\Google\Google Toolbar\Component\fastsearch_A8904FB862BD9564.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.dll
O4 - HKLM\..\Run: [TpShocks] TpShocks.exe
O4 - HKLM\..\Run: [TVT Scheduler Proxy] C:\Program Files\Common Files\Lenovo\Scheduler\scheduler_proxy.exe
O4 - HKLM\..\Run: [ACWLIcon] C:\Program Files\ThinkPad\ConnectUtilities\ACWlIcon.exe
O4 - HKLM\..\Run: [IaNvSrv] C:\Program Files\Intel\Intel Matrix Storage Manager\OROM\IaNvSrv\IaNvSrv.exe
O4 - HKLM\..\Run: [LenovoOobeOffers] c:\SWTOOLS\LenovoWelcome\LenovoOobeOffers.exe /filePath="c:\swshare\firstrun.txt"
O4 - HKLM\..\Run: [ShStatEXE] "C:\Program Files\McAfee\VirusScan Enterprise\SHSTAT.EXE" /STANDALONE
O4 - HKLM\..\Run: [McAfeeUpdaterUI] "C:\Program Files\McAfee\Common Framework\UdaterUI.exe" /StartedFromRunKey
O4 - HKLM\..\Run: [Windows Defender] %ProgramFiles%\Windows Defender\MSASCui.exe -hide
O4 - HKLM\..\Run: [LPManager] C:\PROGRA~1\THINKV~2\PrdCtr\LPMGR.exe
O4 - HKLM\..\Run: [LPMailChecker] C:\PROGRA~1\THINKV~2\PrdCtr\LPMLCHK.exe
O4 - HKLM\..\Run: [SynTPEnh] C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [EZEJMNAP] C:\PROGRA~1\ThinkPad\UTILIT~1\EzEjMnAp.Exe
O4 - HKLM\..\Run: [cssauth] "C:\Program Files\Lenovo\Client Security Solution\cssauth.exe" silent
O4 - HKLM\..\Run: [TPFNF7] C:\PROGRA~1\Lenovo\NPDIRECT\TPFNF7SP.exe /r
O4 - HKLM\..\Run: [TPKMAPHELPER] C:\Program Files\ThinkPad\Utilities\TpKmapAp.exe -helper
O4 - HKLM\..\Run: [PWMTRV] rundll32 C:\PROGRA~1\ThinkPad\UTILIT~1\PWMTR32V.DLL,PwrMgrBkGndMonitor
O4 - HKLM\..\Run: [BLOG] rundll32 C:\PROGRA~1\ThinkPad\UTILIT~1\BTVLogEx.DLL,StartBattLog
O4 - HKLM\..\Run: [SoundMAXPnP] C:\Program Files\Analog Devices\Core\smax4pnp.exe
O4 - HKLM\..\Run: [tsnp2std] C:\Windows\tsnp2std.exe
O4 - HKLM\..\Run: [snp2std] C:\Windows\vsnp2std.exe
O4 - HKLM\..\Run: [IAAnotif] C:\Program Files\Intel\Intel Matrix Storage Manager\iaanotif.exe
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\Windows\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\Windows\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [AppleSyncNotifier] C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleSyncNotifier.exe
O4 - HKLM\..\Run: [Message Center Plus] C:\Program Files\LENOVO\Message Center Plus\MCPLaunch.exe /start
O4 - HKLM\..\Run: [ACTray] C:\Program Files\ThinkPad\ConnectUtilities\ACTray.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKCU\..\Run: [swg] C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
O4 - HKCU\..\Run: [Google Update] "C:\Users\J.Ben.DE-PEDAGOGIE\AppData\Local\Google\Update\GoogleUpdate.exe" /c
O4 - HKCU\..\Run: [Sidebar] C:\Program Files\Windows Sidebar\sidebar.exe /autoRun
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: BTTray.lnk = ?
O4 - Global Startup: Digital Line Detect.lnk = C:\Program Files\Digital Line Detect\DLG.exe
O4 - Global Startup: Gestion du client de Pare-feu Microsoft.lnk = C:\Program Files\Microsoft Firewall Client 2004\FwcMgmt.exe
O4 - Global Startup: VPN Client.lnk = ?
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O8 - Extra context menu item: Envoyer au périphérique &Bluetooth... - C:\Program Files\ThinkPad\Bluetooth Software\btsendto_ie.htm
O8 - Extra context menu item: Envoyer l'&image au périphérique Bluetooth... - C:\Program Files\ThinkPad\Bluetooth Software\btsendto_ie_ctx.htm
O9 - Extra button: Ajout Direct - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra 'Tools' menuitem: &Ajout Direct dans Windows Live Writer - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra button: Skype - {77BF5300-1474-4EC7-9980-D32B190E9B07} - C:\Program Files\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.dll
O9 - Extra button: @btrez.dll,-4015 - {CCA281CA-C863-46ef-9331-5C8D4460577F} - C:\Program Files\ThinkPad\Bluetooth Software\btsendto_ie.htm
O9 - Extra 'Tools' menuitem: @btrez.dll,-12650 - {CCA281CA-C863-46ef-9331-5C8D4460577F} - C:\Program Files\ThinkPad\Bluetooth Software\btsendto_ie.htm
O9 - Extra button: (no name) - {F4F55DC8-0B69-4DFE-BA94-CB677B88B2A3} - C:\Program Files\Lenovo\Client Security Solution\tvtpwm_ie_com.dll
O9 - Extra 'Tools' menuitem: Lenovo Password Manager... - {F4F55DC8-0B69-4DFE-BA94-CB677B88B2A3} - C:\Program Files\Lenovo\Client Security Solution\tvtpwm_ie_com.dll
O15 - Trusted Zone: http://obc.esc-toulouse.fr
O17 - HKLM\System\CCS\Services\Tcpip\Parameters: Domain = de-pedagogie.local
O17 - HKLM\Software\..\Telephony: DomainName = de-pedagogie.local
O17 - HKLM\System\CS1\Services\Tcpip\Parameters: Domain = de-pedagogie.local
O17 - HKLM\System\CS2\Services\Tcpip\Parameters: Domain = de-pedagogie.local
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\COMMON~1\Skype\SKYPE4~1.DLL
O18 - Filter: x-sdch - {B1759355-3EEC-4C1E-B0F1-B719FE26E377} - C:\Program Files\Google\Google Toolbar\Component\fastsearch_A8904FB862BD9564.dll
O23 - Service: Ac Profile Manager Service (AcPrfMgrSvc) - Lenovo - C:\Program Files\ThinkPad\ConnectUtilities\AcPrfMgrSvc.exe
O23 - Service: Access Connections Main Service (AcSvc) - Lenovo - C:\Program Files\ThinkPad\ConnectUtilities\AcSvc.exe
O23 - Service: Andrea ADI Filters Service (AEADIFilters) - Andrea Electronics Corporation - C:\Windows\system32\AEADISRV.EXE
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: Service Bonjour (Bonjour Service) - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: Intel(R) PROSet/Wireless Event Log (EvtEng) - Intel Corporation - C:\Program Files\Intel\Wireless\Bin\EvtEng.exe
O23 - Service: FLEXnet Licensing Service - Macrovision Europe Ltd. - C:\Program Files\Common Files\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: Google Update Service (gupdate1c98d0c7cfab7a0) (gupdate1c98d0c7cfab7a0) - 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: Intel(R) Matrix Storage Event Monitor (IAANTMON) - Intel Corporation - C:\Program Files\Intel\Intel Matrix Storage Manager\IAANTMon.exe
O23 - Service: ThinkPad PM Service (IBMPMSVC) - Lenovo - C:\Windows\system32\ibmpmsvc.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\1050\Intel 32\IDriverT.exe
O23 - Service: Service de l’iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: IviRegMgr - InterVideo - C:\Program Files\Common Files\InterVideo\RegMgr\iviRegMgr.exe
O23 - Service: McAfee Framework Service (McAfeeFramework) - McAfee, Inc. - C:\Program Files\McAfee\Common Framework\FrameworkService.exe
O23 - Service: McAfee McShield (McShield) - McAfee, Inc. - C:\Program Files\McAfee\VirusScan Enterprise\Mcshield.exe
O23 - Service: McAfee Task Manager (McTaskManager) - McAfee, Inc. - C:\Program Files\McAfee\VirusScan Enterprise\VsTskMgr.exe
O23 - Service: NVIDIA Display Driver Service (nvsvc) - NVIDIA Corporation - C:\Windows\system32\nvvsvc.exe
O23 - Service: Power Manager DBC Service - Lenovo - C:\Program Files\ThinkPad\Utilities\PWMDBSVC.EXE
O23 - Service: Intel(R) PROSet/Wireless Registry Service (RegSrvc) - Intel Corporation - C:\Program Files\Intel\Wireless\Bin\RegSrvc.exe
O23 - Service: Roxio UPnP Renderer 9 - Sonic Solutions - C:\Program Files\Roxio\Digital Home 9\RoxioUPnPRenderer9.exe
O23 - Service: Roxio Upnp Server 9 - Sonic Solutions - C:\Program Files\Roxio\Digital Home 9\RoxioUpnpService9.exe
O23 - Service: RoxMediaDB9 - Sonic Solutions - C:\Program Files\Common Files\Roxio Shared\9.0\SharedCOM\RoxMediaDB9.exe
O23 - Service: Steam Client Service - Valve Corporation - C:\Program Files\Common Files\Steam\SteamService.exe
O23 - Service: stllssvr - MicroVision Development, Inc. - C:\Program Files\Common Files\SureThing Shared\stllssvr.exe
O23 - Service: System Update (SUService) - Lenovo Group Limited - c:\program files\lenovo\system update\suservice.exe
O23 - Service: ThinkVantage Registry Monitor Service - Lenovo Group Limited - C:\Program Files\Common Files\Lenovo\tvt_reg_monitor_svc.exe
O23 - Service: ThinkPad HDD APS Logging Service (TPHDEXLGSVC) - Lenovo. - C:\Windows\System32\TPHDEXLG.exe
O23 - Service: TSS Core Service (TSSCoreService) - Lenovo - C:\Program Files\Lenovo\Client Security Solution\tvttcsd.exe
O23 - Service: TVT Backup Protection Service - Unknown owner - C:\Program Files\Lenovo\Rescue and Recovery\rrpservice.exe
O23 - Service: TVT Backup Service - Lenovo Group Limited - C:\Program Files\Lenovo\Rescue and Recovery\rrservice.exe
O23 - Service: TVT Scheduler - Lenovo Group Limited - c:\Program Files\Common Files\Lenovo\Scheduler\tvtsched.exe
O23 - Service: tvtnetwk - Unknown owner - C:\Program Files\Lenovo\Rescue and Recovery\ADM\IUService.exe
O23 - Service: TVT Windows Update Monitor (TVT_UpdateMonitor) - Lenovo Group Limited - C:\Program Files\Lenovo\Rescue and Recovery\UpdateMonitor.exe
O23 - Service: XAudioService - Conexant Systems, Inc. - C:\Windows\system32\DRIVERS\xaudio.exe

--
End of file - 15182 bytes

Configuration: Windows Vista Pro
Safari 530.5
Google Chrome