Déconnexions, redirection

Bonjour,
depuis quelques jours gros problèmes sur Internet

- déconnexions intempestives
- redirection vers des sites de pub

Déjà utilisé avast, cobo fix, rogue killer, malwaresbites, rien n'y fait.

Je joins le rapport de hijackthis

Logfile of HijackThis v1.99.1
Scan saved at 20:55:22, on 01/07/2011
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.17098)

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:\Program Files\Alwil Software\Avast5\AvastSvc.exe
C:\WINDOWS\system32\spoolsv.exe
C:\PROGRA~1\FICHIE~1\AOL\ACS\AOLacsd.exe
c:\APPS\Powercinema\Kernel\TV\CLCapSvc.exe
C:\Program Files\CyberLink\Shared Files\CLML_NTService\CLMLServer.exe
c:\APPS\HIDSERVICE\HIDSERVICE.exe
C:\Program Files\CyberLink\Shared Files\CLML_NTService\CLMLService.exe
C:\Program Files\Java\jre6\bin\jqs.exe
C:\Program Files\Microsoft\Search Enhancement Pack\SeaPort\SeaPort.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Western Digital\WD SmartWare\WD Drive Manager\WDDMService.exe
C:\Program Files\Western Digital\WD SmartWare\Front Parlor\WDSmartWareBackgroundService.exe
C:\Program Files\Yahoo!\SoftwareUpdate\YahooAUService.exe
c:\APPS\Powercinema\Kernel\TV\CLSched.exe
C:\WINDOWS\system32\wbem\wmiapsrv.exe
C:\Program Files\Fichiers communs\Java\Java Update\jusched.exe
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
C:\Program Files\Garmin\gStart.exe
C:\WINDOWS\system32\wuauclt.exe
C:\WINDOWS\explorer.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\internet explorer\iexplore.exe
C:\fix\HijackThis.exe

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
O2 - BHO: &Yahoo! Toolbar Helper - {02478D38-C3F9-4efb-9B51-7695ECA05670} - C:\Program Files\Yahoo!\Companion\Installs\cpn0\yt.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: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn0\yt.dll
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Fichiers communs\Java\Java Update\jusched.exe"
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKCU\..\Run: [gStart] C:\Program Files\Garmin\gStart.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O16 - DPF: {5D86DDB5-BDF9-441B-9E9E-D4730F4EE499} (BDSCANONLINE Control) - http://download.bitdefender.com/resources/scanner/sources/en/scan8/oscan8.cab
O16 - DPF: {7530BFB8-7293-4D34-9923-61A11451AFC5} (OnlineScanner Control) - http://download.eset.com/special/eos-beta/OnlineScanner.cab
O16 - DPF: {E77F23EB-E7AB-4502-8F37-247DBAF1A147} (Windows Live Hotmail Photo Upload Tool) - http://gfx1.hotmail.com/mail/w4/pr01/photouploadcontrol/MSNPUpld.cab
O23 - Service: AOL Connectivity Service (AOL ACS) - America Online, Inc. - C:\PROGRA~1\FICHIE~1\AOL\ACS\AOLacsd.exe
O23 - Service: avast! Antivirus - AVAST Software - C:\Program Files\Alwil Software\Avast5\AvastSvc.exe
O23 - Service: Generic Service for HID Keyboard Input Collections (GenericHidService) - Unknown owner - c:\APPS\HIDSERVICE\HIDSERVICE.exe
O23 - Service: Service Google Update (gupdate1c9da0e1d197618) (gupdate1c9da0e1d197618) - Google Inc. - C:\Program Files\Google\Update\GoogleUpdate.exe
O23 - Service: Service Google Update (gupdatem) (gupdatem) - 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\Fichiers communs\InstallShield\Driver\1150\Intel 32\IDriverT.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Unknown owner - C:\Program Files\Java\jre6\bin\jqs.exe" -service -config "C:\Program Files\Java\jre6\lib\deploy\jqs\jqs.conf (file missing)
O23 - Service: WD SmartWare Drive Manager (WDDMService) - WDC - C:\Program Files\Western Digital\WD SmartWare\WD Drive Manager\WDDMService.exe
O23 - Service: WD SmartWare Background Service (WDSmartWareBackgroundService) - Memeo - C:\Program Files\Western Digital\WD SmartWare\Front Parlor\WDSmartWareBackgroundService.exe
O23 - Service: Yahoo! Updater (YahooAUService) - Yahoo! Inc. - C:\Program Files\Yahoo!\SoftwareUpdate\YahooAUService.exe

Merci pour votre aide précieuse