Ordi qui rame...virus ??

Bonjour,

Depuis quelques temps mon ordi rame et je perds régulièrement le "focus" (impossible de regarder une vidéo en plein écran par exemple, la fenêtre se réduit tout le temps)...alors je me pose la question d'une possible infection.

Merci par avance à ceux qui m'aideront ;)

Voici mon rapport hijack:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 19:43, on 04/03/2012
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.20900)
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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Fichiers communs\Logishrd\Bluetooth\LBTServ.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Avira\AntiVir Desktop\avguard.exe
C:\Program Files\Fichiers communs\Apple\Mobile Device Support\AppleMobileDeviceService.exe
C:\Program Files\Bonjour\mDNSResponder.exe
C:\Program Files\Java\jre6\bin\jqs.exe
C:\WINDOWS\system32\nlssrv32.exe
C:\Program Files\CDBurnerXP\NMSAccessU.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\TuneUp Utilities 2010\TuneUpUtilitiesService32.exe
C:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WLIDSVC.EXE
C:\Program Files\ASUS\Ai Suite\AiNap\AiNap.exe
C:\Program Files\ASUS\Ai Suite\AiGear3\CpuPowerMonitor.exe
C:\Program Files\Logitech\SetPoint\LBTWiz.exe
C:\WINDOWS\RTHDCPL.EXE
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\MOM.exe
C:\Program Files\Fichiers communs\Adobe\ARM\1.0\AdobeARM.exe
C:\Program Files\Canon\MyPrinter\BJMyPrt.exe
C:\Program Files\Canon\Solution Menu EX\CNSEMAIN.EXE
C:\Program Files\Fichiers communs\Java\Java Update\jusched.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Microsoft ActiveSync\Wcescomm.exe
C:\Program Files\MSN Messenger\MsnMsgr.Exe
C:\Program Files\FileHippo.com\UpdateChecker.exe
C:\Program Files\DAEMON Tools Pro\DTAgent.exe
C:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WLIDSvcM.exe
C:\PROGRA~1\MICROS~1\rapimgr.exe
C:\Program Files\Logitech\SetPoint\SetPoint.exe
C:\Program Files\Fichiers communs\Logishrd\KHAL2\KHALMNPR.EXE
C:\Program Files\Avira\AntiVir Desktop\avshadow.exe
C:\Program Files\TuneUp Utilities 2010\TuneUpUtilitiesApp32.exe
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\ccc.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\DAEMON Tools Pro\DTShellHlp.exe
C:\WINDOWS\GALSVW32.EXE
C:\Program Files\Avira\AntiVir Desktop\avgnt.exe
C:\Program Files\Avira\AntiVir Desktop\sched.exe
C:\Program Files\Lavasoft\Ad-Aware\AAWTray.exe
C:\Program Files\Lavasoft\Ad-Aware\AAWService.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Guitar Pro 5\GP5.exe
C:\Program Files\TuneUp Utilities 2010\TuneUpDefragService.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\VideoLAN\VLC\vlc.exe
C:\Program Files\Mozilla Firefox\plugin-container.exe
C:\Program Files\HijackThis\HijackThis.exe
C:\Program Files\Malwarebytes' Anti-Malware\mbam.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.fr/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
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://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O1 - Hosts: 74.208.105.171 gs.apple.com
O2 - BHO: GigagetIEHelper - {111CAA23-6F4F-42AC-8555-B48C1D87BBAB} - C:\WINDOWS\system32\gigagetbho_v10.dll
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: Windows Live ID Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: NTIECatcher Class - {C56CB6B0-0D96-11D6-8C65-B2868B609932} - C:\Program Files\NetTransport 2\NTIEHelper.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre7\bin\jp2ssv.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Program Files\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O4 - HKLM\..\Run: [Ai Nap] "C:\Program Files\ASUS\Ai Suite\AiNap\AiNap.exe"
O4 - HKLM\..\Run: [CPU Power Monitor] "C:\Program Files\ASUS\Ai Suite\AiGear3\CpuPowerMonitor.exe"
O4 - HKLM\..\Run: [Cpu Level Up help] C:\Program Files\ASUS\Ai Suite\CpuLevelUpHelp.exe
O4 - HKLM\..\Run: [Bluetooth Connection Assistant] LBTWIZ.EXE -silent
O4 - HKLM\..\Run: [StartCCC] "C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\CLIStart.exe" MSRun
O4 - HKLM\..\Run: [AdobeCS4ServiceManager] "C:\Program Files\Fichiers communs\Adobe\CS4ServiceManager\CS4ServiceManager.exe" -launchedbylogin
O4 - HKLM\..\Run: [AppleSyncNotifier] C:\Program Files\Fichiers communs\Apple\Mobile Device Support\AppleSyncNotifier.exe
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [Kernel and Hardware Abstraction Layer] KHALMNPR.EXE
O4 - HKLM\..\Run: [AdobeAAMUpdater-1.0] "C:\Program Files\Fichiers communs\Adobe\OOBE\PDApp\UWA\UpdaterStartupUtility.exe"
O4 - HKLM\..\Run: [SwitchBoard] C:\Program Files\Fichiers communs\Adobe\SwitchBoard\SwitchBoard.exe
O4 - HKLM\..\Run: [AdobeCS5ServiceManager] "C:\Program Files\Fichiers communs\Adobe\CS5ServiceManager\CS5ServiceManager.exe" -launchedbylogin
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [Adobe ARM] "C:\Program Files\Fichiers communs\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKLM\..\Run: [CanonMyPrinter] C:\Program Files\Canon\MyPrinter\BJMyPrt.exe /logon
O4 - HKLM\..\Run: [CanonSolutionMenuEx] C:\Program Files\Canon\Solution Menu EX\CNSEMAIN.EXE /logon
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\Avira\AntiVir Desktop\avgnt.exe" /min
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Fichiers communs\Java\Java Update\jusched.exe"
O4 - HKLM\..\Run: [APSDaemon] "C:\Program Files\Fichiers communs\Apple\Apple Application Support\APSDaemon.exe"
O4 - HKLM\..\Run: [amd_dc_opt] C:\Program Files\AMD\Dual-Core Optimizer\amd_dc_opt.exe
O4 - HKLM\..\RunOnce: [Malwarebytes Anti-Malware] C:\Program Files\Malwarebytes' Anti-Malware\mbamgui.exe /install /silent
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [H/PC Connection Agent] "C:\Program Files\Microsoft ActiveSync\Wcescomm.exe"
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [FileHippo.com] "C:\Program Files\FileHippo.com\UpdateChecker.exe" /background
O4 - HKCU\..\Run: [DAEMON Tools Pro Agent] "C:\Program Files\DAEMON Tools Pro\DTAgent.exe" -autorun
O4 - HKCU\..\RunOnce: [FlashPlayerUpdate] C:\WINDOWS\system32\Macromed\Flash\FlashUtil11e_Plugin.exe -update plugin
O4 - HKUS\S-1-5-18\..\RunOnce: [nltide_2] regsvr32 /s /n /i:U shell32 (User 'SYSTEM')
O4 - HKUS\S-1-5-18\..\RunOnce: [nltide_3] rundll32 advpack.dll,LaunchINFSectionEx nLite.inf,C,,4,N (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\RunOnce: [nltide_2] regsvr32 /s /n /i:U shell32 (User 'Default user')
O4 - Global Startup: Logitech SetPoint.lnk = C:\Program Files\Logitech\SetPoint\SetPoint.exe
O8 - Extra context menu item: &Download All by Gigaget - C:\Program Files\Gigaget\getallurl.htm
O8 - Extra context menu item: &Download by Gigaget - C:\Program Files\Gigaget\geturl.htm
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O9 - Extra button: Create Mobile Favorite - {2EAF5BB1-070F-11D3-9307-00C04FAE2D4F} - C:\PROGRA~1\MICROS~1\INetRepl.dll
O9 - Extra button: (no name) - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - C:\PROGRA~1\MICROS~1\INetRepl.dll
O9 - Extra 'Tools' menuitem: Créer un Favori de l'appareil mobile... - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - C:\PROGRA~1\MICROS~1\INetRepl.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
O15 - Trusted Zone: *.acteurfse.net (HKLM)
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://www.update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1228506290984
O16 - DPF: {E2883E8F-472F-4FB0-9522-AC9BF37916A7} - http://platformdl.adobe.com/NOS/getPlusPlus/1.6/gp.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{A4FF39FB-6D24-4294-802E-20253C7B2CD1}: NameServer = 212.27.40.240,212.27.40.241
O17 - HKLM\System\CCS\Services\Tcpip\..\{E5B30922-9ACB-4B70-A8B5-30E995794122}: NameServer = 212.27.40.240,212.27.40.241
O23 - Service: Avira Planificateur (AntiVirSchedulerService) - Avira Operations GmbH & Co. KG - C:\Program Files\Avira\AntiVir Desktop\sched.exe
O23 - Service: Avira Protection temps réel (AntiVirService) - Avira Operations GmbH & Co. KG - C:\Program Files\Avira\AntiVir Desktop\avguard.exe
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files\Fichiers communs\Apple\Mobile Device Support\AppleMobileDeviceService.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.exe
O23 - Service: Service Bonjour (Bonjour Service) - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: Indexing Service (CiSvc) - Unknown owner - C:\WINDOWS\system32\cisvc.exe (file missing)
O23 - Service: FLEXnet Licensing Service - Acresso Software Inc. - 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: Service Google Update (gupdatem) (gupdatem) - 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: Lavasoft Ad-Aware Service - Lavasoft Limited - C:\Program Files\Lavasoft\Ad-Aware\AAWService.exe
O23 - Service: Logitech Bluetooth Service (LBTServ) - Logitech, Inc. - C:\Program Files\Fichiers communs\Logishrd\Bluetooth\LBTServ.exe
O23 - Service: Nalpeiron Licensing Service (nlsX86cc) - Nalpeiron Ltd. - C:\WINDOWS\system32\nlssrv32.exe
O23 - Service: NMSAccess - Unknown owner - C:\Program Files\CDBurnerXP\NMSAccessU.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: Remote Packet Capture Protocol v.0 (experimental) (rpcapd) - CACE Technologies - C:\Program Files\WinPcap\rpcapd.exe
O23 - Service: SwitchBoard - Adobe Systems Incorporated - C:\Program Files\Fichiers communs\Adobe\SwitchBoard\SwitchBoard.exe
O23 - Service: TuneUp Drive Defrag Service (TuneUp.Defrag) - TuneUp Software - C:\Program Files\TuneUp Utilities 2010\TuneUpDefragService.exe
O23 - Service: TuneUp Utilities Service (TuneUp.UtilitiesSvc) - TuneUp Software - C:\Program Files\TuneUp Utilities 2010\TuneUpUtilitiesService32.exe