Pb de pc qui ralentit

Bonjour, j'ai un souci depuis peu j'ai mon pc qui est ralenti de plus en plus, j'ai installé plusieurs logiciels (antivirus, antimalware, etc..) qui m'ont retiré des "virus" ou autre logiciels malveillants. Mais j'ai l'impression qu'il y a encore des choses cachés, même après plusieurs scans.

Je suis sous windows xp, et j'utilise :
-MBAM
-Ad-aware
-Antivir antivirus
-ZA

De plus j'ai remarqué, pour ceux qui connaissent ce jeu :LOL, que en fin de partie le jeu rame de plus en plus.

Merci pour l'aide, voici mon rapport Hijackthis :

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 11:23:30, on 14/03/2012
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP3 (6.00.2900.5512)
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:\WINDOWS\system32\Ati2evxx.exe
E:\ZoneAlarm\CheckPoint\ZoneAlarm\vsmon.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\CheckPoint\ZAForceField\IswSvc.exe
C:\Program Files\Lavasoft\Ad-Aware\AAWService.exe
C:\Program Files\CheckPoint\ZAForceField\ForceField.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Avira\AntiVir Desktop\sched.exe
C:\WINDOWS\RTHDCPL.EXE
C:\Program Files\ANI\ANIWZCS2 Service\WZCSLDR2.exe
E:\AirGCFG.exe
C:\Program Files\BboxUpdate\BTLiveUpdate.exe
C:\Program Files\Avira\AntiVir Desktop\avgnt.exe
E:\ZoneAlarm\CheckPoint\ZoneAlarm\zatray.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\MOM.exe
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\ccc.exe
C:\Program Files\ANI\ANIWZCS2 Service\ANIWZCSdS.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
E:\Java\bin\jqs.exe
C:\WINDOWS\system32\PnkBstrA.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Avira\AntiVir Desktop\avshadow.exe
C:\WINDOWS\system32\wbem\wmiapsrv.exe
C:\WINDOWS\System32\svchost.exe
E:\league of legend\Riot Games\League of Legends\RADS\system\rads_user_kernel.exe
E:\league of legend\Riot Games\League of Legends\RADS\projects\lol_launcher\releases\0.0.0.54\deploy\LoLLauncher.exe
E:\league of legend\Riot Games\League of Legends\RADS\projects\lol_air_client\releases\0.0.0.132\deploy\LolClient.exe
C:\WINDOWS\system32\taskmgr.exe
C:\Program Files\Pando Networks\Media Booster\PMB.exe
C:\Documents and Settings\Bureau\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
C:\Documents and Settings\Bureau\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
E:\hijackthis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://search.babylon.com/?AF=100995&babsrc=HP_ss&mntrId=404a15ee00000000000000241d68524b
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: ZoneAlarm Security Engine Registrar - {8A4A36C2-0535-4D2C-BD3D-496CB7EED6E3} - C:\Program Files\CheckPoint\ZAForceField\TrustChecker\bin\TrustCheckerIEPlugin.dll
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: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - E:\Java\bin\jp2ssv.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - E:\Java\lib\deploy\jqs\ie\jqs_plugin.dll
O3 - Toolbar: ZoneAlarm Security Engine - {EE2AC4E5-B0B0-4EC6-88A9-BCA1A32AB107} - C:\Program Files\CheckPoint\ZAForceField\TrustChecker\bin\TrustCheckerIEPlugin.dll
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [Alcmtr] ALCMTR.EXE
O4 - HKLM\..\Run: [GEST] =
O4 - HKLM\..\Run: [ANIWZCS2Service] C:\Program Files\ANI\ANIWZCS2 Service\WZCSLDR2.exe
O4 - HKLM\..\Run: [D-Link D-Link Wireless G DWA-110] E:\AirGCFG.exe
O4 - HKLM\..\Run: [UserFaultCheck] %systemroot%\system32\dumprep 0 -u
O4 - HKLM\..\Run: [BboxUpdate] C:\Program Files\BboxUpdate\BTLiveUpdate.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] "E:\iTunesHelper.exe"
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Fichiers communs\Java\Java Update\jusched.exe"
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\Avira\AntiVir Desktop\avgnt.exe" /min
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "E:\adobe\Reader 09\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [Adobe ARM] "C:\Program Files\Fichiers communs\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKLM\..\Run: [ISW] C:\Program Files\CheckPoint\ZAForceField\ForceField.exe /icon="hidden"
O4 - HKLM\..\Run: [ZoneAlarm] "E:\ZoneAlarm\CheckPoint\ZoneAlarm\zatray.exe"
O4 - HKLM\..\Run: [StartCCC] "C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\CLIStart.exe" MSRun
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Google Update] "C:\Documents and Settings\Bureau\Local Settings\Application Data\Google\Update\GoogleUpdate.exe" /c
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE RÉSEAU')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
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: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1262724776250
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O23 - Service: ANIWZCSd Service (ANIWZCSdService) - Wireless Service - C:\Program Files\ANI\ANIWZCS2 Service\ANIWZCSdS.exe
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: Service Bonjour (Bonjour Service) - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: Service de l'iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: ZoneAlarm Toolbar IswSvc (IswSvc) - Check Point Software Technologies - C:\Program Files\CheckPoint\ZAForceField\IswSvc.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - E:\Java\bin\jqs.exe
O23 - Service: Lavasoft Ad-Aware Service - Lavasoft Limited - C:\Program Files\Lavasoft\Ad-Aware\AAWService.exe
O23 - Service: PnkBstrA - Unknown owner - C:\WINDOWS\system32\PnkBstrA.exe
O23 - Service: TrueVector Internet Monitor (vsmon) - Check Point Software Technologies LTD - E:\ZoneAlarm\CheckPoint\ZoneAlarm\vsmon.exe