PC qui rame a fond + probléme connection msn

Tout d'abord bonsoir a tous et bonne fete de la musique.
J'ai un problème avec mon pc premièrement il rame a fond, et de plus qu'en je veux me connecter sur MSN messenger, on me ditproblème de fichier host. Alors de temps en tant j'arrive a me connecter et parfois impossible. Pouvait vous m'aider.
Merci
Voici un scan hijackthis/


Logfile of HijackThis v1.99.1
Scan saved at 22:53:06, on 21/06/2006
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

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\system32\spoolsv.exe
C:\WINDOWS\System32\cisvc.exe
C:\Program Files\Executive Software\Diskeeper\DkService.exe
C:\Program Files\ewido anti-malware\ewidoctrl.exe
C:\Program Files\ewido anti-malware\ewidoguard.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\WINDOWS\system32\HPZipm12.exe
C:\WINDOWS\System32\tcpsvcs.exe
C:\WINDOWS\System32\snmp.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Fichiers communs\Softwin\BitDefender Communicator\xcommsvr.exe
C:\WINDOWS\system32\cidaemon.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\pctspk.exe
C:\WINDOWS\htpatch.exe
C:\WINDOWS\System32\sistray.EXE
C:\WINDOWS\System32\khooker.exe
C:\Program Files\Softwin\BitDefender9\bdoesrv.exe
C:\progra~1\softwin\bitdef~1\bdnagent.exe
C:\progra~1\softwin\bitdef~1\bdswitch.exe
C:\Program Files\Java\jre1.5.0_07\bin\jusched.exe
C:\Program Files\MessengerPlus! 3\MsgPlus.exe
C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
C:\Program Files\NETGEAR\WG111v2 Configuration Utility\RtlWake.exe
C:\Program Files\HP\Digital Imaging\bin\hpqgalry.exe
C:\Program Files\NETGEAR\WG111v2 Configuration Utility\RtWLan.exe
C:\Program Files\MSN Messenger\msnmsgr.exe
C:\Program Files\Fichiers communs\Softwin\BitDefender Update Service\livesrv.exe
C:\Program Files\Fichiers communs\Softwin\BitDefender Scan Server\bdss.exe
C:\Program Files\Softwin\BitDefender9\vsserv.exe
c:\progra~1\softwin\bitdef~1\bdmcon.exe
C:\Documents and Settings\rodriguez\Bureau\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://fr.yahoo.com/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://fr.yahoo.com/
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: (no name) - {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\jre1.5.0_07\bin\ssv.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar2.dll
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar2.dll
O4 - HKLM\..\Run: [SchedulingAgent] mstinit.exe /firstlogon
O4 - HKLM\..\Run: [PCTVOICE] pctspk.exe
O4 - HKLM\..\Run: [MPB] C:\WINDOWS\System32\MPB.exe
O4 - HKLM\..\Run: [HTpatch] C:\WINDOWS\htpatch.exe
O4 - HKLM\..\Run: [SiS Tray] C:\WINDOWS\System32\sistray.EXE
O4 - HKLM\..\Run: [SiS KHooker] C:\WINDOWS\System32\khooker.exe
O4 - HKLM\..\Run: [AVG7_CC] C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe /STARTUP
O4 - HKLM\..\Run: [BDMCon] c:\PROGRA~1\softwin\BITDEF~1\bdmcon.exe
O4 - HKLM\..\Run: [BDOESRV] "C:\Program Files\Softwin\BitDefender9\bdoesrv.exe"
O4 - HKLM\..\Run: [BDNewsAgent] "c:\progra~1\softwin\bitdef~1\bdnagent.exe"
O4 - HKLM\..\Run: [BDSwitchAgent] "c:\progra~1\softwin\bitdef~1\bdswitch.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\jre1.5.0_07\bin\jusched.exe
O4 - HKLM\..\Run: [MessengerPlus3] "C:\Program Files\MessengerPlus! 3\MsgPlus.exe"
O4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
O4 - HKCU\..\Run: [BgMonitor_{79662E04-7C6C-4d9f-84C7-88D8A56B10AA}] "C:\Program Files\Fichiers communs\Ahead\lib\NMBgMonitor.exe"
O4 - Global Startup: Démarrage rapide du logiciel HP Image Zone.lnk = C:\Program Files\HP\Digital Imaging\bin\hpqthb08.exe
O4 - Global Startup: HP Digital Imaging Monitor.lnk = C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
O4 - Global Startup: WG111v2 Smart Wizard Wireless Setting.lnk = ?
O8 - Extra context menu item: &Traduire à partir de l'anglais - res://c:\program files\google\GoogleToolbar2.dll/cmwordtrans.html
O8 - Extra context menu item: Pages liées - res://c:\program files\google\GoogleToolbar2.dll/cmbacklinks.html
O8 - Extra context menu item: Pages similaires - res://c:\program files\google\GoogleToolbar2.dll/cmsimilar.html
O8 - Extra context menu item: Recherche &Google - res://c:\program files\google\GoogleToolbar2.dll/cmsearch.html
O8 - Extra context menu item: Version de la page actuelle disponible dans le cache Google - res://c:\program files\google\GoogleToolbar2.dll/cmcache.html
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_07\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_07\bin\ssv.dll
O9 - Extra button: ShopperReports - Compare product prices - {946B3E9E-E21A-49c8-9F63-900533FAFE15} - C:\WINDOWS\System32\shdocvw.dll
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
O14 - IERESET.INF: START_PAGE_URL=http://fr.yahoo.com/
O16 - DPF: {0EB0E74A-2A76-4AB3-A7FB-9BD8C29F7F75} (CKAVWebScan Object) - http://webscanner.kaspersky.fr/kavwebscan_unicode.cab
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://spaces.msn.com//PhotoUpload/MsnPUpld.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls...
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O20 - Winlogon Notify: WgaLogon - C:\WINDOWS\SYSTEM32\WgaLogon.dll
O23 - Service: BitDefender Scan Server (bdss) - Unknown owner - C:\Program Files\Fichiers communs\Softwin\BitDefender Scan Server\bdss.exe" /service (file missing)
O23 - Service: Diskeeper - Executive Software International, Inc. - C:\Program Files\Executive Software\Diskeeper\DkService.exe
O23 - Service: ewido security suite control - ewido networks - C:\Program Files\ewido anti-malware\ewidoctrl.exe
O23 - Service: ewido security suite guard - ewido networks - C:\Program Files\ewido anti-malware\ewidoguard.exe
O23 - Service: BitDefender Desktop Update Service (LIVESRV) - Unknown owner - C:\Program Files\Fichiers communs\Softwin\BitDefender Update Service\livesrv.exe" /service (file missing)
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: BitDefender Virus Shield (VSSERV) - Unknown owner - C:\Program Files\Softwin\BitDefender9\vsserv.exe" /service (file missing)
O23 - Service: BitDefender Communicator (XCOMM) - Unknown owner - C:\Program Files\Fichiers communs\Softwin\BitDefender Communicator\xcommsvr.exe" /service (file missing)