Pub intempestive et ralentissement pc

Bonjour,

J'ai un gros souci depuis quelques temps avec des publicités qui s'affichent sans arrêt et un très fort ralentissement des performances de mon pc (réactions très tardives) et souvent ma fenetre de démarrage internet qui n'est pas la bonne.
Après avoir fait la panoplie complète (enfin pas mal complète à mon avis) : CCleaner, easycleaner, regcleaner, tune up, spybot, malwarebytes, plugin adblock plus sous mozilla, defragmentation... rien à changer!
Je suis sous XP et j'ai l'antivirus avira.
Je ne sais plus quoi faire. Voici le rapport hijackthis. Merci d'avance pour votre aide

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 15:44:58, on 29/12/2009
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v8.00 (8.00.6001.18702)
Boot mode: Normal

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe
C:\Program Files\a-squared Free\a2service.exe
C:\Program Files\ATI Technologies\ATI.ACE\cli.exe
C:\Program Files\Adobe\Photoshop Elements 4.0\PhotoshopElementsFileAgent.exe
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\WINDOWS\RTHDCPL.EXE
C:\WINDOWS\AGRSMMSG.exe
C:\Program Files\Toshiba\Toshiba Applet\thotkey.exe
C:\WINDOWS\system32\TPSMain.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe
C:\WINDOWS\system32\TDispVol.exe
C:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
C:\Program Files\Synaptics\SynTP\Toshiba.exe
C:\Program Files\Bonjour\mDNSResponder.exe
C:\Program Files\TOSHIBA\ConfigFree\CFSvcs.exe
C:\Program Files\SimpleCenter\bin\win\sclauncher.exe
C:\WINDOWS\system32\TPSBattM.exe
C:\Program Files\Adobe\Acrobat 8.0\Acrobat\Acrotray.exe
C:\Program Files\Java\jre6\bin\jqs.exe
C:\Program Files\Cyberlink\Shared files\RichVideo.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe
C:\Program Files\Java\jre6\bin\jusched.exe
C:\Program Files\Fichiers communs\Ulead Systems\AutoDetector\monitor.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Rainlendar2\Rainlendar2.exe
C:\Program Files\SiSoftware\SiSoftware Sandra Lite XII.SP2c\RpcAgentSrv.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Program Files\Microsoft\Search Enhancement Pack\SeaPort\SeaPort.exe
C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Toshiba\TOSHIBA Applet\TAPPSRV.exe
C:\Program Files\Fichiers communs\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
C:\Program Files\iPod\bin\iPodService.exe
C:\WINDOWS\system32\wbem\wmiapsrv.exe
C:\Program Files\ATI Technologies\ATI.ACE\cli.exe
C:\Program Files\ATI Technologies\ATI.ACE\cli.exe
C:\Program Files\Windows Live\Messenger\msnmsgr.exe
C:\Program Files\Java\jre6\bin\jucheck.exe
C:\Program Files\Windows Live\Messenger\usnsvc.exe
C:\Program Files\Fichiers communs\Adobe\Updater5\AdobeUpdater.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\avscan.exe
C:\Documents and Settings\escrouzailles\Mes documents\Mes fichiers reçus\EasyClea.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Spybot - Search & Destroy\SpybotSD.exe
C:\Documents and Settings\escrouzailles\Mes documents\Téléchargements\HiJackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr/?ocid=iehp
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://home.myquickfinder.com
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr/?ocid=iehp
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
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = https://www.bing.com/?FORM=TOOLBR&cc=fr&toHttps=1&redig=4527FFF1C12746FC9EDB535C75E80ECC
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: Aide pour le lien d'Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: Automated Content Enhancer - {1D74E9DD-8987-448b-B2CB-67FFF2B8A932} - C:\Program Files\Automated Content Enhancer\4.1.0.5190\ACEIEAddOn.dll
O2 - BHO: Search Helper - {6EBF7485-159F-4bff-A14F-B9E3AAC4465B} - C:\Program Files\Microsoft\Search Enhancement Pack\Search Helper\SEPsearchhelperie.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: Programme d'aide de l'Assistant de connexion Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Adobe PDF Conversion Toolbar Helper - {AE7CD045-E861-484f-8273-0445EE161910} - C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.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: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Program Files\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O3 - Toolbar: Adobe PDF - {47833539-D0C5-4125-9FA8-0819E2EAAC93} - C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll
O4 - HKLM\..\Run: [ATICCC] "C:\Program Files\ATI Technologies\ATI.ACE\cli.exe" runtime -Delay
O4 - HKLM\..\Run: [SynTPEnh] C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [AGRSMMSG] AGRSMMSG.exe
O4 - HKLM\..\Run: [THotkey] C:\Program Files\Toshiba\Toshiba Applet\thotkey.exe
O4 - HKLM\..\Run: [TPSMain] TPSMain.exe
O4 - HKLM\..\Run: [TDispVol] TDispVol.exe
O4 - HKLM\..\Run: [sclauncher] C:\Program Files\SimpleCenter\bin\win\sclauncher.exe
O4 - HKLM\..\Run: [Acrobat Assistant 8.0] "C:\Program Files\Adobe\Acrobat 8.0\Acrobat\Acrotray.exe"
O4 - HKLM\..\Run: [Adobe_ID0EYTHM] C:\PROGRA~1\FICHIE~1\Adobe\ADOBEV~1\Server\bin\VERSIO~2.EXE
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe" /min
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre6\bin\jusched.exe"
O4 - HKLM\..\Run: [Ulead AutoDetector v2] C:\Program Files\Fichiers communs\Ulead Systems\AutoDetector\monitor.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\RunOnce: [Malwarebytes' Anti-Malware (registration)] regsvr32.exe /s "C:\Program Files\Malwarebytes' Anti-Malware\mbamext.dll"
O4 - HKLM\..\RunOnce: [Malwarebytes' Anti-Malware] C:\Program Files\Malwarebytes' Anti-Malware\mbamgui.exe /install /silent
O4 - HKLM\..\RunOnce: [InnoSetupRegFile.0000000001] "C:\WINDOWS\is-68856.exe" /REG
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Rainlendar2] C:\Program Files\Rainlendar2\Rainlendar2.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
O4 - Global Startup: Adobe Reader Synchronizer.lnk = C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AdobeCollabSync.exe
O4 - Global Startup: Lancement rapide d'Adobe Acrobat.lnk = ?
O8 - Extra context menu item: &Search - ?p=ZS
O8 - Extra context menu item: Add to Windows &Live Favorites - https://onedrive.live.com/?id=favorites
O8 - Extra context menu item: Ajouter au fichier PDF existant - res://C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Convertir en Adobe PDF - res://C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convertir la cible du lien en Adobe PDF - res://C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convertir la cible du lien en un fichier PDF existant - res://C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Convertir la sélection en Adobe PDF - res://C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convertir la sélection en un fichier PDF existant - res://C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Convertir les liens sélectionnés en fichier Adobe PDF - res://C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIECaptureSelLinks.html
O8 - Extra context menu item: Convertir les liens sélectionnés en un fichier PDF existant - res://C:\Program Files\Adobe\Acrobat 8.0\Acrobat\AcroIEFavClient.dll/AcroIEAppendSelLinks.html
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: Ouvrir dans un nouvel onglet d'arrière-plan - res://C:\Program Files\Windows Live Toolbar\Components\fr-fr\msntabres.dll.mui/229?be5402ed17b1408588197c5ebb86a4ce
O8 - Extra context menu item: Ouvrir dans un nouvel onglet de premier plan - res://C:\Program Files\Windows Live Toolbar\Components\fr-fr\msntabres.dll.mui/230?be5402ed17b1408588197c5ebb86a4ce
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: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\Office12\REFIEBAR.DLL
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://gfx1.hotmail.com/mail/w3/resources/MSNPUpld.cab
O16 - DPF: {5D637FAD-E202-48D1-8F18-5B9C459BD1E3} (Image Uploader Control) - http://www.new2.foto.com/ImageUploader5.cab
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{5C73C9A9-97B8-4507-A17A-40C4729ABDC5}: NameServer = 212.30.96.108,213.203.124.146
O17 - HKLM\System\CCS\Services\Tcpip\..\{CF0112C0-7891-49BD-B219-C6B1B3D0BF2F}: NameServer = 192.168.1.1
O23 - Service: a-squared Free Service (a2free) - Emsi Software GmbH - C:\Program Files\a-squared Free\a2service.exe
O23 - Service: Adobe LM Service - Adobe Systems - C:\Program Files\Fichiers communs\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: Adobe Version Cue CS3 {fr_FR} (Adobe Version Cue CS3) - Adobe Systems Incorporated - C:\Program Files\Fichiers communs\Adobe\Adobe Version Cue CS3\Server\bin\VersionCueCS3.exe
O23 - Service: Adobe Active File Monitor V4 (AdobeActiveFileMonitor4.0) - Unknown owner - C:\Program Files\Adobe\Photoshop Elements 4.0\PhotoshopElementsFileAgent.exe
O23 - Service: Planificateur Avira AntiVir Personal - Free Antivirus (AntiVirScheduler) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe
O23 - Service: Avira AntiVir Personal - Free Antivirus Guard (AntiVirService) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: Service Bonjour (Bonjour Service) - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: ConfigFree Service (CFSvcs) - TOSHIBA CORPORATION - C:\Program Files\TOSHIBA\ConfigFree\CFSvcs.exe
O23 - Service: FLEXnet Licensing Service - Macrovision Europe Ltd. - C:\Program Files\Fichiers communs\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.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\Fichiers communs\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: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Program Files\Java\jre6\bin\jqs.exe
O23 - Service: Norton Protection Center Service (NSCService) - Unknown owner - C:\Program Files\Fichiers communs\Symantec Shared\Security Console\NSCSRVCE.EXE (file missing)
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: QuestService Service - Unknown owner - C:\Documents and Settings\All Users\Application Data\QuestService\questservice129.exe (file missing)
O23 - Service: Cyberlink RichVideo Service(CRVS) (RichVideo) - Unknown owner - C:\Program Files\Cyberlink\Shared files\RichVideo.exe
O23 - Service: SiSoftware Deployment Agent Service (SandraAgentSrv) - SiSoftware - C:\Program Files\SiSoftware\SiSoftware Sandra Lite XII.SP2c\RpcAgentSrv.exe
O23 - Service: TOSHIBA Application Service (TAPPSRV) - TOSHIBA Corp. - C:\Program Files\Toshiba\TOSHIBA Applet\TAPPSRV.exe
O23 - Service: wampapache - Apache Software Foundation - c:\wamp\bin\apache\apache2.2.11\bin\httpd.exe
O23 - Service: wampmysqld - Unknown owner - c:\wamp\bin\mysql\mysql5.1.30\bin\mysqld.exe