Virus letsroll et autres dut au P2P

bonjour

j ai un gros probleme ,enfin plusieurs...je voudrais de l aide svp.je sais po si tous ces probleme sont lié au meme probleme.

1 er probleme:

donc je n est installer aucun antivirus (je sais c po bien) mais po le temp .je fais du P2P (telechargement ) et ds chaque reception du telechargement de chaque logiciel il y a plein de dossier compresse WIRAR (beaucoup "no crack cd etc...")

2 emme probleme:

ma page d acceuil a internet est http://letsroll911.org/ipw-web/bulletin/bb/viewtopic.php?t=3 et a chaque fois que je change ma page celle ci revient toujours impossible de la changer

3 eme probleme

losque j installe un antivirus et qu il est activer impossible d aller sur internet !!

ca t aidera surement :

Logfile of HijackThis v1.99.1
Scan saved at 14:29:05, on 29/07/2005
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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Fichiers communs\Symantec Shared\ccSetMgr.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Norton AntiVirus\navapsvc.exe
C:\Program Files\Norton AntiVirus\IWP\NPFMntor.exe
C:\Program Files\Analog Devices\SoundMAX\SMAgent.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\SYSTEM32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Fichiers communs\Logitech\QCDriver\LVCOMS.EXE
C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
C:\Program Files\Alcatel\SpeedTouch USB\Dragdiag.exe
C:\Program Files\MSN Apps\Updater\01.02.3000.1001\fr\msnappau.exe
C:\WINDOWS\system32\letsroll.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\DOCUME~1\Cedric\LOCALS~1\Temp\Rar$EX00.547\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://letsroll911.org/ipw-web/bulletin/bb/viewtopic.php?t=3
O3 - Toolbar: MSN - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Program Files\MSN Apps\MSN Toolbar\01.02.4000.1001\fr\msntb.dll (file missing)
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Program Files\Norton AntiVirus\NavShExt.dll (file missing)
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar2.dll
O4 - HKLM\..\Run: [pccguide.exe] "C:\Program Files\Trend Micro\PC-cillin 2002\pccguide.exe"
O4 - HKLM\..\Run: [PCCClient.exe] "C:\Program Files\Trend Micro\PC-cillin 2002\PCCClient.exe"
O4 - HKLM\..\Run: [Pop3trap.exe] "C:\Program Files\Trend Micro\PC-cillin 2002\Pop3trap.exe"
O4 - HKLM\..\Run: [LVCOMS] C:\Program Files\Fichiers communs\Logitech\QCDriver\LVCOMS.EXE
O4 - HKLM\..\Run: [NeroCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [ATIPTA] C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM\..\Run: [SpeedTouch USB Diagnostics] "C:\Program Files\Alcatel\SpeedTouch USB\Dragdiag.exe" /icon
O4 - HKLM\..\Run: [webHancer Survey Companion] "C:\Program Files\webHancer\Programs\whSurvey.exe"
O4 - HKLM\..\Run: [msnappau] "C:\Program Files\MSN Apps\Updater\01.02.3000.1001\fr\msnappau.exe"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [NAV CfgWiz] "C:\Program Files\Norton AntiVirus\CfgWiz.exe" /GUID {0D7956A2-5A08-4ec2-A72C-DF8495A66016} /MODE CfgWiz /CMDLINE "REBOOT"
O4 - HKLM\..\Run: [system] C:\WINDOWS\system32\letsroll.exe
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office10\OSA.EXE
O8 - Extra context menu item: &Google Search - res://c:\program files\google\GoogleToolbar2.dll/cmsearch.html
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
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: Version de la page actuelle disponible dans le cache Google - res://c:\program files\google\GoogleToolbar2.dll/cmcache.html
O9 - Extra button: (no name) - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - (no file)
O9 - Extra button: Yahoo! Messenger - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - C:\PROGRA~1\Yahoo!\MESSEN~1\YPager.exe
O9 - Extra 'Tools' menuitem: Yahoo! Messenger - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - C:\PROGRA~1\Yahoo!\MESSEN~1\YPager.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe (file missing)
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe (file missing)
O10 - Broken Internet access because of LSP provider 'xfire_lsp_10406.dll' missing
O12 - Plugin for .mpeg: C:\Program Files\Internet Explorer\PLUGINS\npqtplugin3.dll
O16 - DPF: {74D05D43-3236-11D4-BDCD-00C04F9A3B61} (HouseCall Control) - http://a840.g.akamai.net/7/840/537/2004061001/housecall.trendmicro.com/housecall/xscan53.cab
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/msnmessengersetupdownloader.cab
O16 - DPF: {BFF1950D-B1B4-4AE8-B842-B2CCF06D9A1B} (Zylom Games Player) - http://game14.zylomgames.com/activex/zylomgamesplayer.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{494A5A22-57D6-4553-AA79-D6DC7C6906AA}: NameServer = 217.19.192.131 217.19.192.132
O20 - AppInit_DLLs: PAVWAIT.DLL
O20 - Winlogon Notify: MCPClient - C:\PROGRA~1\FICHIE~1\Stardock\mcpstub.dll (file missing)
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: Symantec Password Validation (ccPwdSvc) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\ccPwdSvc.exe
O23 - Service: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\ccSetMgr.exe
O23 - Service: Norton AntiVirus Auto-Protect Service (navapsvc) - Symantec Corporation - C:\Program Files\Norton AntiVirus\navapsvc.exe
O23 - Service: Norton AntiVirus Firewall Monitor Service (NPFMntor) - Symantec Corporation - C:\Program Files\Norton AntiVirus\IWP\NPFMntor.exe
O23 - Service: PC-cillin PersonalFirewall (PCCPFW) - Unknown owner - C:\Program Files\Trend Micro\PC-cillin 2002\PCCPFW.exe (file missing)
O23 - Service: SAVScan - Symantec Corporation - C:\Program Files\Norton AntiVirus\SAVScan.exe
O23 - Service: ScriptBlocking Service (SBService) - Symantec Corporation - C:\PROGRA~1\FICHIE~1\SYMANT~1\SCRIPT~1\SBServ.exe
O23 - Service: SoundMAX Agent Service (SoundMAX Agent Service (default)) - Analog Devices, Inc. - C:\Program Files\Analog Devices\SoundMAX\SMAgent.exe
O23 - Service: Trend NT Realtime Service (Tmntsrv) - Unknown owner - C:\Program Files\Trend Micro\PC-cillin 2002\Tmntsrv.exe (file missing)

j ai oublier impossible de desinstaller les antivirus

merci de votre reponse