Redirections automatiques non desirées

Bonjour,
J'ai, depuis une date récente, des problèmes de redirections automatiques non souhaitées depuis Google. J'ai téléchargé Hijack this sur le forum et fait un scan dont voici le compte-rendu :

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 10:20:35, on 05/11/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
Boot mode: Normal

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\csrss.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\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Lavasoft\Ad-Aware 2007\aawservice.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\CA\eTrust EZ Armor\eTrust EZ Antivirus\ISafe.exe
D:\Program Files\Alcohol Soft\Alcohol 120\StarWind\StarWindServiceAE.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\tgbstarter.exe
C:\Program Files\MINDSCAPE\MCF\TGBBOB.exe
C:\Program Files\Neuf\Kit\WiFi\9wifi.exe
C:\Program Files\CA\eTrust EZ Armor\eTrust EZ Antivirus\CAVRID.exe
C:\Program Files\CA\eTrust EZ Armor\eTrust EZ Antivirus\CAVTray.exe
C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
D:\Program Files\RamBoost XP\rambxpfr.exe
C:\WINDOWS\System32\alg.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WLLoginProxy.exe
C:\WINDOWS\explorer.exe
D:\Program Files\Mozilla Firefox\firefox.exe
C:\Hijack This\HijackThis.exe
C:\WINDOWS\system32\wbem\wmiprvse.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.files-ftp.com/~unicorni/phpBB2/index.php
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.files-ftp.com/~unicorni/phpBB2/index.php
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: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.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: Google Toolbar Helper - {AA58ED58-01DD-4D91-8333-CF10577473F7} - C:\Program Files\Google\googletoolbar1.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program Files\Google\GoogleToolbarNotifier\2.0.301.7164\swg.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar3.dll
O4 - HKLM\..\Run: [Autoconfigurateur WiFi Neuf] "C:\Program Files\Neuf\Kit\WiFi\9wifi.exe"
O4 - HKLM\..\Run: [CAVRID] "C:\Program Files\CA\eTrust EZ Armor\eTrust EZ Antivirus\CAVRID.exe"
O4 - HKLM\..\Run: [CaAvTray] "C:\Program Files\CA\eTrust EZ Armor\eTrust EZ Antivirus\CAVTray.exe"
O4 - HKLM\..\Run: [MSConfig] C:\WINDOWS\PCHealth\HelpCtr\Binaries\MSConfig.exe /auto
O4 - HKCU\..\Run: [swg] C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
O4 - HKCU\..\Run: [RamBoostXp] D:\Program Files\RamBoost XP\rambxpfr.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
O14 - IERESET.INF: START_PAGE_URL=http://www.files-ftp.com/~unicorni/phpBB2/index.php
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://download.microsoft.com/download/E/5/6/E5611B10-0D6D-4117-8430-A67417AA88CD/LegitCheckControl.cab
O16 - DPF: {201B9B37-848F-40BD-90EA-7B8F0AA89D6A} - http://scripts.dlv4.com/binaries/egaccess4/egaccess4_1071_em_XP.cab
O16 - DPF: {CD995117-98E5-4169-9920-6C12D4C0B548} (HGPlugin9USA Class) - http://gamedownload.ijjimax.com/gamedownload/dist/hgstart/HGPlugin9USA.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{5321813C-8128-4960-9EA6-32EAEF824B08}: NameServer = 208.67.220.220,208.67.222.222
O17 - HKLM\System\CCS\Services\Tcpip\..\{75A87AB0-88F2-4496-89A2-3B1B3D067E7D}: NameServer = 85.255.114.45,85.255.112.112
O17 - HKLM\System\CCS\Services\Tcpip\..\{851D876E-D662-4335-8FD1-83F9AD27D6E7}: NameServer = 85.255.114.45,85.255.112.112
O17 - HKLM\System\CCS\Services\Tcpip\..\{C8664569-E751-4E6C-BCC6-7D4EBDE5BBCC}: NameServer = 85.255.114.45,85.255.112.112
O17 - HKLM\System\CCS\Services\Tcpip\..\{C89EB3FA-1DCE-4EE5-9F06-14A0C51C447B}: NameServer = 85.255.114.45,85.255.112.112
O17 - HKLM\System\CCS\Services\Tcpip\..\{EF860EC7-E442-4EDD-838E-AE92F95BBA96}: NameServer = 85.255.114.45,85.255.112.112
O17 - HKLM\System\CS1\Services\Tcpip\Parameters: NameServer = 208.67.220.220,208.67.222.222
O17 - HKLM\System\CS2\Services\Tcpip\Parameters: NameServer = 208.67.220.220,208.67.222.222
O17 - HKLM\System\CCS\Services\Tcpip\Parameters: NameServer = 208.67.220.220,208.67.222.222
O20 - Winlogon Notify: TGBBOB - C:\WINDOWS\SYSTEM32\TGBBOBNotif.dll
O23 - Service: Ad-Aware 2007 Service (aawservice) - Lavasoft AB - C:\Program Files\Lavasoft\Ad-Aware 2007\aawservice.exe
O23 - Service: CAISafe - Computer Associates International, Inc. - C:\Program Files\CA\eTrust EZ Armor\eTrust EZ Antivirus\ISafe.exe
O23 - Service: StarWind AE Service (StarWindServiceAE) - Rocket Division Software - D:\Program Files\Alcohol Soft\Alcohol 120\StarWind\StarWindServiceAE.exe
O23 - Service: TGB::BOB! Starter - Unknown owner - C:\WINDOWS\system32\tgbstarter.exe
O23 - Service: TGB::BOB! (TGBBOB) - SISTECH - TheGreenBow - C:\Program Files\MINDSCAPE\MCF\TGBBOB.exe