Connexion internet lente

Bonjour,

Depuis quelque jours ma connexion internet est très lent (5ko/s !!!).Pour une raison inconnue. J'ai deux pc connecte et un telephone portable. Jusqu'a maintenant, je me connectais sans probleme avec les trois engins(j'ai regler le modem pour partage la connexion).Donc, je pense que le probleme vient de mon PC

Comment puis-je remédier a ce probleme ? Merci d'avance

Rapport HiJackThis :
Configuration: Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 12:31:25, on 25/12/2010
Platform: Windows XP SP3 (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\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\svchost.exe
D:\Program Files\Ad-Aware\aawservice.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Alwil Software\Avast5\AvastSvc.exe
C:\Program Files\Alwil Software\Avast5\avastUI.exe
C:\Program Files\ANI\ANIWZCS2 Service\WZCSLDR2.exe
C:\Program Files\D-Link\D-Link Wireless G DWA-110\AirGCFG.exe
D:\Program Files\Wallpaper\Wallpaper.exe
D:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Application Updater\ApplicationUpdater.exe
C:\Program Files\Bonjour\mDNSResponder.exe
C:\Program Files\TuneUp Utilities 2011\TuneUpUtilitiesService32.exe
C:\Program Files\TuneUp Utilities 2011\TuneUpUtilitiesApp32.exe
C:\WINDOWS\System32\alg.exe
C:\Program Files\Mozilla Firefox 4.0 Beta 8\firefox.exe
D:\Program Files\ThreatFire\TFService.exe
D:\Program Files\ThreatFire\TFTray.exe
D:\Program Files\ThreatFire\TFGui.exe
C:\Program Files\Mozilla Firefox 4.0 Beta 8\plugin-container.exe
D:\Program Files\Hijack This\Trend Micro\HiJackThis\HiJackThis.exe
C:\WINDOWS\system32\wbem\wmiprvse.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://hp.mywebsearch.com/mywebsearch/index.html?n=77C09F4F&ptnrS=ZJfox000&ptb=PnbethdBAKfrtD6iObDiSw
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.acer.com/worldwide/selection.html
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = http=;ftp=;https=;
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: SearchSettings Class - {E312764E-7706-43F1-8DAB-FCDD2B1E416D} - C:\Program Files\Search Settings\SearchSettings.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: SearchSettings Class - {E312764E-7706-43F1-8DAB-FCDD2B1E416D} - C:\Program Files\Search Settings\SearchSettings.dll
O4 - HKLM\..\Run: [avast5] "C:\Program Files\Alwil Software\Avast5\avastUI.exe" /nogui
O4 - HKLM\..\Run: [ANIWZCS2Service] C:\Program Files\ANI\ANIWZCS2 Service\WZCSLDR2.exe
O4 - HKLM\..\Run: [D-Link D-Link Wireless G DWA-110] C:\Program Files\D-Link\D-Link Wireless G DWA-110\AirGCFG.exe
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [ThreatFire] D:\Program Files\ThreatFire\TFTray.exe
O4 - HKLM\..\RunOnce: [SpybotDeletingA7061] command.com /c del "C:\Program Files\MyWebSearch\bar\History\search3"
O4 - HKLM\..\RunOnce: [SpybotDeletingC2116] cmd.exe /c del "C:\Program Files\MyWebSearch\bar\History\search3"
O4 - HKLM\..\RunOnce: [SpybotDeletingA3882] command.com /c del "C:\Program Files\MyWebSearch\bar\Settings\s_pid.dat"
O4 - HKLM\..\RunOnce: [SpybotDeletingC6460] cmd.exe /c del "C:\Program Files\MyWebSearch\bar\Settings\s_pid.dat"
O4 - HKCU\..\Run: [Wallpaper] "D:\Program Files\Wallpaper\Wallpaper.exe" Starter
O4 - HKCU\..\Run: [SpybotSD TeaTimer] D:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
O4 - HKCU\..\RunOnce: [SpybotDeletingB6941] command.com /c del "C:\Program Files\MyWebSearch\bar\History\search3"
O4 - HKCU\..\RunOnce: [SpybotDeletingD2805] cmd.exe /c del "C:\Program Files\MyWebSearch\bar\History\search3"
O4 - HKCU\..\RunOnce: [SpybotDeletingB4928] command.com /c del "C:\Program Files\MyWebSearch\bar\Settings\s_pid.dat"
O4 - HKCU\..\RunOnce: [SpybotDeletingD6500] cmd.exe /c del "C:\Program Files\MyWebSearch\bar\Settings\s_pid.dat"
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
O14 - IERESET.INF: START_PAGE_URL=https://www.acer.com/worldwide/selection.html
O22 - SharedTaskScheduler: Pré-chargeur Browseui - {438755C2-A8BA-11D1-B96B-00A0C90312E1} - C:\WINDOWS\System32\browseui.dll
O22 - SharedTaskScheduler: Démon de cache des catégories de composant - {8C7461EF-2B13-11d2-BE35-3078302C2030} - C:\WINDOWS\System32\browseui.dll
O23 - Service: Lavasoft Ad-Aware Service (aawservice) - Lavasoft - D:\Program Files\Ad-Aware\aawservice.exe
O23 - Service: ANIWZCSd Service (ANIWZCSdService) - Wireless Service - C:\Program Files\ANI\ANIWZCS2 Service\ANIWZCSdS.exe
O23 - Service: Application Updater - Spigot, Inc. - C:\Program Files\Application Updater\ApplicationUpdater.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: avast! Antivirus - AVAST Software - C:\Program Files\Alwil Software\Avast5\AvastSvc.exe
O23 - Service: avast! Mail Scanner - AVAST Software - C:\Program Files\Alwil Software\Avast5\AvastSvc.exe
O23 - Service: avast! Web Scanner - AVAST Software - C:\Program Files\Alwil Software\Avast5\AvastSvc.exe
O23 - Service: ##Id_String1.6844F930_1628_4223_B5CC_5BB94B879762## (Bonjour Service) - Apple Computer, Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: Service d'administration du Gestionnaire de disque logique (dmadmin) - Unknown owner - C:\WINDOWS\System32\dmadmin.exe
O23 - Service: Journal des événements (Eventlog) - Unknown owner - C:\WINDOWS\system32\services.exe
O23 - Service: FLEXnet Licensing Service - Macrovision Europe Ltd. - C:\Program Files\Fichiers communs\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: Service COM de gravage de CD IMAPI (ImapiService) - Unknown owner - C:\WINDOWS\System32\imapi.exe
O23 - Service: Partage de Bureau à distance NetMeeting (mnmsrvc) - Unknown owner - C:\WINDOWS\System32\mnmsrvc.exe
O23 - Service: Plug-and-Play (PlugPlay) - Unknown owner - C:\WINDOWS\system32\services.exe
O23 - Service: Gestionnaire de session d'aide sur le Bureau à distance (RDSessMgr) - Unknown owner - C:\WINDOWS\system32\sessmgr.exe
O23 - Service: Remote Packet Capture Protocol v.0 (experimental) (rpcapd) - CACE Technologies - C:\Program Files\WinPcap\rpcapd.exe
O23 - Service: Carte à puce (SCardSvr) - Unknown owner - C:\WINDOWS\System32\SCardSvr.exe
O23 - Service: Journaux et alertes de performance (SysmonLog) - Unknown owner - C:\WINDOWS\system32\smlogsvc.exe
O23 - Service: ThreatFire - PC Tools - D:\Program Files\ThreatFire\TFService.exe
O23 - Service: TuneUp Utilities Service (TuneUp.UtilitiesSvc) - TuneUp Software - C:\Program Files\TuneUp Utilities 2011\TuneUpUtilitiesService32.exe
O23 - Service: Cliché instantané de volume (VSS) - Unknown owner - C:\WINDOWS\System32\vssvc.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\mysql5.1.36\bin\mysqld.exe
O23 - Service: Carte de performance WMI (WmiApSrv) - Unknown owner - C:\WINDOWS\System32\wbem\wmiapsrv.exe

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