Bonjour, j'ai essayé plusieurs solution pour me débarrasser du problème suivant:
lorsque j'effectue une recherche (google) et que je clique sur un résultat de ma recherche la page qui s'ouvre alors est immédiatement redirigée vers un autre site web "bestofchoice" si je me souvient bien, et ce problème a lieu sur différents navigateurs (IE, FF) voici un log Hijackthis:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 09:57:38, on 06/07/2009
Platform: Windows Vista SP1 (WinNT 6.00.1905)
MSIE: Internet Explorer v7.00 (7.00.6001.18248)
Boot mode: Normal

Running processes:
C:\Windows\System32\smss.exe
C:\Windows\system32\csrss.exe
C:\Windows\system32\wininit.exe
C:\Windows\system32\csrss.exe
C:\Windows\system32\winlogon.exe
C:\Windows\system32\services.exe
C:\Windows\system32\lsass.exe
C:\Windows\system32\lsm.exe
C:\Windows\system32\svchost.exe
C:\Windows\System32\svchost.exe
C:\Windows\system32\svchost.exe
C:\Windows\System32\svchost.exe
C:\Windows\system32\Ati2evxx.exe
C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe
C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe
C:\Windows\system32\SLsvc.exe
C:\Windows\system32\svchost.exe
C:\Windows\system32\Ati2evxx.exe
C:\Windows\system32\Hpservice.exe
C:\Windows\system32\svchost.exe
C:\Program Files\Lavasoft\Ad-Aware\AAWService.exe
C:\Windows\System32\spoolsv.exe
C:\Program Files\Avira\AntiVir Desktop\sched.exe
C:\Windows\system32\svchost.exe
C:\Windows\system32\AEADISRV.EXE
C:\Windows\system32\agrsmsvc.exe
C:\Program Files\Avira\AntiVir Desktop\avguard.exe
C:\Windows\system32\svchost.exe
C:\Program Files\Common Files\InterVideo\RegMgr\iviRegMgr.exe
C:\Program Files\Common Files\LightScribe\LSSrvc.exe
C:\Program Files\PDF Complete\pdfsvc.exe
C:\Windows\system32\PnkBstrA.exe
C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe
C:\Program Files\TeamViewer\Version4\TeamViewer_Service.exe
C:\Windows\System32\svchost.exe
C:\Windows\system32\SearchIndexer.exe
C:\Program Files\Hewlett-Packard\Shared\hpqwmiex.exe
C:\Program Files\Common Files\Softwin\BitDefender Update Service\livesrv.exe
C:\Program Files\Common Files\Softwin\BitDefender Scan Server\bdss.exe
C:\Windows\system32\wbem\unsecapp.exe
C:\Windows\system32\wbem\wmiprvse.exe
C:\Windows\system32\taskeng.exe
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\MOM.exe
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\CCC.exe
C:\Windows\system32\taskeng.exe
C:\Windows\system32\Dwm.exe
C:\Windows\Explorer.EXE
C:\Program Files\Enigma Software Group\SpyHunter\Spyhunter3.exe
C:\Program Files\Hewlett-Packard\IAM\bin\asghost.exe
C:\Program Files\Hewlett-Packard\HP Health Check\hphc_service.exe
C:\WINDOWS\SMINST\scheduler.exe
C:\Program Files\Windows Defender\MSASCui.exe
C:\Program Files\Hewlett-Packard\HP ProtectTools Security Manager\pthosttr.exe
C:\Program Files\Windows Media Player\wmpnetwk.exe
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\Program Files\Hewlett-Packard\HP Wireless Assistant\HPWAMain.exe
C:\Program Files\Hewlett-Packard\HP Wireless Assistant\WiFiMsg.exe
C:\Program Files\Hewlett-Packard\HP Quick Launch Buttons\QLBCTRL.exe
C:\Program Files\Analog Devices\Core\smax4pnp.exe
C:\Program Files\Hp\HP Software Update\hpwuSchd2.exe
C:\Program Files\Java\jre6\bin\jusched.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\Program Files\Avira\AntiVir Desktop\avgnt.exe
C:\Program Files\Logitech\Video\LogiTray.exe
C:\Program Files\Windows Media Player\wmpnscfg.exe
C:\Program Files\RocketDock\RocketDock.exe
C:\Program Files\DNA\btdna.exe
C:\Program Files\Hewlett-Packard\Shared\HpqToaster.exe
C:\Windows\system32\wbem\unsecapp.exe
C:\Program Files\Logitech\Video\FxSvr2.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\GCV6GFOH\HiJackThis[1].exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.hp.com
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = www.hp.com
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.hp.com
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\Main,Start Page = http://www.hp.com
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
O1 - Hosts: localhost 127.0.0.1
O1 - Hosts: localhost cs.xfire.com
O2 - BHO: (no name) - {02478D38-C3F9-4efb-9B51-7695ECA05670} - (no file)
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\Program Files\Spybot - Search & Destroy\SDHelper.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O2 - BHO: Credential Manager for HP ProtectTools - {DF21F1DB-80C6-11D3-9483-B03D0EC10000} - C:\Program Files\Hewlett-Packard\IAM\Bin\ItIEAddIn.dll
O4 - HKLM\..\Run: [Windows Defender] %ProgramFiles%\Windows Defender\MSASCui.exe -hide
O4 - HKLM\..\Run: [PTHOSTTR] C:\Program Files\Hewlett-Packard\HP ProtectTools Security Manager\PTHOSTTR.EXE /Start
O4 - HKLM\..\Run: [SynTPEnh] C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [hpWirelessAssistant] %ProgramFiles%\Hewlett-Packard\HP Wireless Assistant\HPWAMain.exe
O4 - HKLM\..\Run: [WAWifiMessage] %ProgramFiles%\Hewlett-Packard\HP Wireless Assistant\WiFiMsg.exe
O4 - HKLM\..\Run: [HP Health Check Scheduler] C:\Program Files\Hewlett-Packard\HP Health Check\HPHC_Scheduler.exe
O4 - HKLM\..\Run: [QlbCtrl] %ProgramFiles%\Hewlett-Packard\HP Quick Launch Buttons\QlbCtrl.exe /Start
O4 - HKLM\..\Run: [CognizanceTS] rundll32.exe C:\PROGRA~1\HEWLET~1\IAM\Bin\ASTSVCC.dll,RegisterModule
O4 - HKLM\..\Run: [WatchDog] C:\Program Files\InterVideo\DVD Check\DVDCheck.exe
O4 - HKLM\..\Run: [SoundMAXPnP] C:\Program Files\Analog Devices\Core\smax4pnp.exe
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: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\Avira\AntiVir Desktop\avgnt.exe" /min
O4 - HKLM\..\Run: [LogitechVideoTray] C:\Program Files\Logitech\Video\LogiTray.exe
O4 - HKLM\..\Run: [LogitechVideoRepair] C:\Program Files\Logitech\Video\ISStart.exe
O4 - HKLM\..\RunOnce: [ST Recovery Launcher] %WINDIR%\SMINST\launcher.exe
O4 - HKCU\..\Run: [StartCCC] c:\Program Files\ATI Technologies\ATI.ACE\Core-Static\CLIStart.exe
O4 - HKCU\..\Run: [LogitechSoftwareUpdate] "C:\Program Files\Logitech\Video\ManifestEngine.exe" boot
O4 - HKCU\..\Run: [RocketDock] "C:\Program Files\RocketDock\RocketDock.exe"
O4 - HKCU\..\Run: [BitTorrent DNA] "C:\Program Files\DNA\btdna.exe"
O4 - HKCU\..\Run: [WMPNSCFG] C:\Program Files\Windows Media Player\WMPNSCFG.exe
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: DVD Check.lnk = C:\Program Files\InterVideo\DVD Check\DVDCheck.exe
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~1\Office12\REFIEBAR.DLL
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\Program Files\Spybot - Search & Destroy\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search && Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\Program Files\Spybot - Search & Destroy\SDHelper.dll
O10 - Unknown file in Winsock LSP: c:\windows\system32\prxernsp.dll
O10 - Unknown file in Winsock LSP: c:\windows\system32\prxerdrv.dll
O10 - Unknown file in Winsock LSP: c:\windows\system32\prxerdrv.dll
O13 - Gopher Prefix:
O16 - DPF: {3860DD98-0549-4D50-AA72-5D17D200EE10} (Windows Live OneCare safety scanner control) - http://cdn.scan.onecare.live.com/resource/download/scanner/fr-fr/wlscctrl2.cab
O16 - DPF: {5D6F45B3-9043-443D-A792-115447494D24} (UnoCtrl Class) - http://messenger.zone.msn.com/FR-FR/a-UNO1/GAME_UNO1.cab
O16 - DPF: {73ECB3AA-4717-450C-A2AB-D00DAD9EE203} (GMNRev Class) - http://h20270.www2.hp.com/ediags/gmn2/install/HPProductDetection2.cab
O16 - DPF: {C3F79A2B-B9B4-4A66-B012-3EE46475B072} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab56907.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{1E5FC248-50B4-4A66-900F-D14DEE82EA23}: NameServer = 85.255.112.212,85.255.112.169
O17 - HKLM\System\CCS\Services\Tcpip\..\{68D35D07-E6C8-4154-A60B-CEB568774F53}: NameServer = 85.255.112.212,85.255.112.169
O17 - HKLM\System\CS1\Services\Tcpip\Parameters: NameServer = 85.255.112.212,85.255.112.169
O17 - HKLM\System\CS1\Services\Tcpip\..\{1E5FC248-50B4-4A66-900F-D14DEE82EA23}: NameServer = 85.255.112.212,85.255.112.169
O17 - HKLM\System\CS2\Services\Tcpip\Parameters: NameServer = 85.255.112.212,85.255.112.169
O17 - HKLM\System\CS2\Services\Tcpip\..\{1E5FC248-50B4-4A66-900F-D14DEE82EA23}: NameServer = 85.255.112.212,85.255.112.169
O17 - HKLM\System\CCS\Services\Tcpip\Parameters: NameServer = 85.255.112.212,85.255.112.169
O20 - AppInit_DLLs: APSHook.dll
O23 - Service: Andrea ADI Filters Service (AEADIFilters) - Andrea Electronics Corporation - C:\Windows\system32\AEADISRV.EXE
O23 - Service: Agere Modem Call Progress Audio (AgereModemAudio) - Agere Systems - C:\Windows\system32\agrsmsvc.exe
O23 - Service: Avira AntiVir Planificateur (AntiVirSchedulerService) - Avira GmbH - C:\Program Files\Avira\AntiVir Desktop\sched.exe
O23 - Service: Avira AntiVir Guard (AntiVirService) - Avira GmbH - C:\Program Files\Avira\AntiVir Desktop\avguard.exe
O23 - Service: Ati External Event Utility - ATI Technologies Inc. - C:\Windows\system32\Ati2evxx.exe
O23 - Service: Com4Qlb - Hewlett-Packard Development Company, L.P. - C:\Program Files\Hewlett-Packard\HP Quick Launch Buttons\Com4Qlb.exe
O23 - Service: HP Health Check Service - Hewlett-Packard - C:\Program Files\Hewlett-Packard\HP Health Check\hphc_service.exe
O23 - Service: hpqwmiex - Hewlett-Packard Development Company, L.P. - C:\Program Files\Hewlett-Packard\Shared\hpqwmiex.exe
O23 - Service: HP Service (hpsrv) - Unknown owner - C:\Windows\system32\Hpservice.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: IviRegMgr - InterVideo - C:\Program Files\Common Files\InterVideo\RegMgr\iviRegMgr.exe
O23 - Service: Lavasoft Ad-Aware Service - Lavasoft - C:\Program Files\Lavasoft\Ad-Aware\AAWService.exe
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Hewlett-Packard Company - C:\Program Files\Common Files\LightScribe\LSSrvc.exe
O23 - Service: PDF Document Manager (pdfcDispatcher) - PDF Complete Inc - C:\Program Files\PDF Complete\pdfsvc.exe
O23 - Service: PnkBstrA - Unknown owner - C:\Windows\system32\PnkBstrA.exe
O23 - Service: RoxMediaDB9 - Sonic Solutions - c:\Program Files\Common Files\Roxio Shared\9.0\SharedCOM\RoxMediaDB9.exe
O23 - Service: SBSD Security Center Service (SBSDWSCService) - Safer Networking Ltd. - C:\Program Files\Spybot - Search & Destroy\SDWinSec.exe
O23 - Service: stllssvr - MicroVision Development, Inc. - c:\Program Files\Common Files\SureThing Shared\stllssvr.exe
O23 - Service: TeamViewer 4 (TeamViewer4) - TeamViewer GmbH - C:\Program Files\TeamViewer\Version4\TeamViewer_Service.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\mysql5.1.32\bin\mysqld.exe
O23 - Service: BitDefender Communicator (XCOMM) - SOFTWIN S.R.L - C:\Program Files\Common Files\Softwin\BitDefender Communicator\xcommsvr.exe
End of file - 13358 bytes