Virus et connexion internet

Bonjour,

Voilà mon problème. Depuis une semaine, je connais de gros problèmes de connexion internet. en effet, j'ai une livebox en 8 méga, et lorsque je souhaite surfer sur le net, les pages web ne s'affichent pas, ou très lentement. De plus, j'ai pu constater que lorsque j'active mon wifi, mon processeur est utilisé à 70% de ces capacités sans que le moindre programme n'ait été lancé. j'en déduis donc, qu'il soit fort possible qu'il y ait un virus sur mon ordi.

Voilà ce que j'obtient avec hijackthis:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 17:27:17, on 30/03/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16608)
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\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\system32\spoolsv.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
C:\Program Files\Launch Manager\CtrlVol.exe
C:\WINDOWS\system32\igfxpers.exe
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\Documents and Settings\All Users\Menu Démarrer\Programmes\Démarrage\msupdate.exe
C:\Program Files\Launch Manager\HotkeyApp.exe
C:\WINDOWS\tppaldr.exe
C:\Program Files\Launch Manager\Wbutton.exe
C:\Program Files\Launch Manager\LaunchAp.exe
C:\Program Files\Microsoft Office\Office\1036\OLFSNT40.EXE
C:\Program Files\Winamp\winampa.exe
C:\Program Files\HP\hpcoretech\hpcmpmgr.exe
C:\WINDOWS\AGRSMMSG.exe
C:\PROGRA~1\MESSAG~1\Demon.exe
C:\WINDOWS\system32\igfxtray.exe
C:\Program Files\Java\jre1.6.0_05\bin\jusched.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\system32\hkcmd.exe
C:\Program Files\Windows Media Player\WMPNSCFG.exe
C:\Program Files\Synaptics\SynTP\SynTPLpr.exe
C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
C:\WINDOWS\System32\FTRTSVC.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Fichiers communs\LightScribe\LSSrvc.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\UAService7.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
c:\documents and settings\all users\menu démarrer\programmes\démarrage\msupdate.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page =
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr/?ocid=iehp
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.msn.com/fr-fr/?ocid=iehp
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,First Home Page = https://support.microsoft.com/en-US/topic/internet-explorer-downloads-d49e1f0d-571c-9a7b-d97e-be248806ca70
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = 66.118.40.142:3128
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = localhost
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_05\bin\ssv.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: ST - {9394EDE7-C8B5-483E-8773-474BF36AF6E4} - C:\Program Files\MSN Apps\ST\01.03.0000.1005\en-xu\stmain.dll
O2 - BHO: MSNToolBandBHO - {BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Program Files\MSN Apps\MSN Toolbar\MSN Toolbar\01.02.5000.1021\fr\msntb.dll
O2 - BHO: EpsonToolBandKicker Class - {E99421FB-68DD-40F0-B4AC-B7027CAE2F1A} - C:\Program Files\EPSON\EPSON Web-To-Page\EPSON Web-To-Page.dll (file missing)
O3 - Toolbar: EPSON Web-To-Page - {EE5D279F-081B-4404-994D-C6B60AAEBA6D} - C:\Program Files\EPSON\EPSON Web-To-Page\EPSON Web-To-Page.dll (file missing)
O4 - HKLM\..\Run: [SynTPLpr] C:\Program Files\Synaptics\SynTP\SynTPLpr.exe
O4 - HKLM\..\Run: [SynTPEnh] C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [LaunchAp] C:\Program Files\Launch Manager\LaunchAp.exe
O4 - HKLM\..\Run: [HotkeyApp] C:\Program Files\Launch Manager\HotkeyApp.exe
O4 - HKLM\..\Run: [CtrlVol] C:\Program Files\Launch Manager\CtrlVol.exe
O4 - HKLM\..\Run: [Wbutton] "C:\Program Files\Launch Manager\Wbutton.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_05\bin\jusched.exe"
O4 - HKLM\..\Run: [AGRSMMSG] AGRSMMSG.exe
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [HP Component Manager] "C:\Program Files\HP\hpcoretech\hpcmpmgr.exe"
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [CheckMedi8or] C:\Program Files\Mediator 7 Pro\CheckNewUser.exe
O4 - HKLM\..\Run: [TPP Auto Loader] C:\WINDOWS\tppaldr.exe
O4 - HKLM\..\Run: [Demon] C:\PROGRA~1\MESSAG~1\Demon.exe
O4 - HKLM\..\Run: [igfxtray] C:\WINDOWS\system32\igfxtray.exe
O4 - HKLM\..\Run: [igfxhkcmd] C:\WINDOWS\system32\hkcmd.exe
O4 - HKLM\..\Run: [igfxpers] C:\WINDOWS\system32\igfxpers.exe
O4 - HKLM\..\Run: [EPSON Stylus DX4200 Series] C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_FATIAEE.EXE /P26 "EPSON Stylus DX4200 Series" /O6 "USB001" /M "Stylus DX4200"
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [WOOWATCH] C:\PROGRA~1\Wanadoo\Watch.exe
O4 - HKLM\..\Run: [PinnacleDriverCheck] C:\WINDOWS\system32\\PSDrvCheck.exe
O4 - HKLM\..\Run: [WinampAgent] C:\Program Files\Winamp\winampa.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [WOOKIT] C:\PROGRA~1\Wanadoo\Shell.exe appLaunchClientZone.shl|PARAM= cnx
O4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
O4 - HKCU\..\Run: [WMPNSCFG] C:\Program Files\Windows Media Player\WMPNSCFG.exe
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')
O4 - Startup: Folding@Home 5.03.lnk = ?
O4 - Global Startup: Adobe Reader Speed Launch.lnk = C:\Program Files\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office\OSA9.EXE
O4 - Global Startup: msupdate.exe
O4 - Global Startup: Symantec Fax Starter Edition Port.lnk = C:\Program Files\Microsoft Office\Office\1036\OLFSNT40.EXE
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_05\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_05\bin\ssv.dll
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.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
O9 - Extra button: Messager Wanadoo - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\PROGRA~1\MESSAG~1\Messager Wanadoo.exe
O9 - Extra 'Tools' menuitem: Messager Wanadoo - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\PROGRA~1\MESSAG~1\Messager Wanadoo.exe
O9 - Extra button: Orange - {1462651F-F4BA-4C76-A001-C4284D0FE16E} - https://www.orange.fr/portail (file missing) (HKCU)
O16 - DPF: {00B71CFB-6864-4346-A978-C0A14556272C} (Checkers Class) - http://messenger.zone.msn.com/binary/msgrchkr.cab31267.cab
O16 - DPF: {2250C29C-C5E9-4F55-BE4E-01E45A40FCF1} (CMediaMix Object) - http://musicmix.messenger.msn.com/Medialogic.CAB
O16 - DPF: {2917297F-F02B-4B9D-81DF-494B6333150B} (Minesweeper Flags Class) - http://messenger.zone.msn.com/binary/MineSweeper.cab31267.cab
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - https://onedrive.live.com/
O16 - DPF: {5D6F45B3-9043-443D-A792-115447494D24} (UnoCtrl Class) - http://messenger.zone.msn.com/FR-FR/a-UNO1/GAME_UNO1.cab
O16 - DPF: {70BA88C8-DAE8-4CE9-92BB-979C4A75F53B} (GSDACtl Class) - http://www.gamespy.com
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsClient.cab31267.cab
O16 - DPF: {917623D1-D8E5-11D2-BE8B-00104B06BDE3} (CamImage Class) - http://paris.tourismeville.wanadoo.fr/AxisCamControl.cab
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/MsnMessengerSetupDownloader.cab
O16 - DPF: {C3F79A2B-B9B4-4A66-B012-3EE46475B072} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab56907.cab
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O16 - DPF: {E473A65C-8087-49A3-AFFD-C5BC4A10669B} (Quantum Streaming IE Player Class) - http://mvnet.xlontech.net/qm/fox/06101102/qsp2ie06101001.cab
O16 - DPF: {F5A7706B-B9C0-4C89-A715-7A0C6B05DD48} (Minesweeper Flags Class) - http://messenger.zone.msn.com/binary/MineSweeper.cab56986.cab
O16 - DPF: {F6BF0D00-0B2A-4A75-BF7B-F385591623AF} (Solitaire Showdown Class) - http://messenger.zone.msn.com/binary/SolitaireShowdown.cab31267.cab
O16 - DPF: {FE0BD779-44EE-4A4B-AA2E-743C63F2E5E6} (IWinAmpActiveX Class) - http://pdl.stream.aol.com/downloads/aol/unagi/ampx_en_dl.cab
O20 - AppInit_DLLs: clkern.dll
O23 - Service: Adobe LM Service - Adobe Systems - C:\Program Files\Fichiers communs\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
O23 - Service: AVG Anti-Spyware Guard - GRISOFT s.r.o. - C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
O23 - Service: France Telecom Routing Table Service (FTRTSVC) - France Telecom - C:\WINDOWS\System32\FTRTSVC.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Fichiers communs\InstallShield\Driver\1150\Intel 32\IDriverT.exe
O23 - Service: Sunbelt Kerio Personal Firewall 4 (KPF4) - Sunbelt Software - C:\Program Files\Sunbelt Software\Personal Firewall\kpf4ss.exe
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Unknown owner - C:\Program Files\Fichiers communs\LightScribe\LSSrvc.exe
O23 - Service: SecuROM User Access Service (V7) (UserAccess7) - Unknown owner - C:\WINDOWS\system32\UAService7.exe