PB ECRANS PARASITAIRES CONNEXION INTERNET

Bonjour,

J'ai de très gros problèmes avec mon ordi. OK, je n'ai plus d'Antivirus depuis longtemps ... J'ai INTERNET via le câble, et depuis qu'un ami est venu faire des recherches sur différents sites, lors de l'ouverture de mon PC, INTERNET se lance mais d'une lenteur, et surtout en affichant écrans parasitaires sur écrans parasitaires, sans que je puisse me connecter normalement. J'ai essayé de mettre certains sites unable, mais rien n'y fait !!
De plus, j'ai bcp de messages d'erreur lors de l'ouverture du PC.
J'ai lancé un scan avec HIJCKTHIS, voici ce qu'il en ressort :
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Logfile of HijackThis v1.99.1
Scan saved at 20:35:14, on 28/09/2006
Platform: Windows 2000 SP3 (WinNT 5.00.2195)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

Running processes:
C:\WINNT\System32\smss.exe
C:\WINNT\system32\winlogon.exe
C:\WINNT\system32\services.exe
C:\WINNT\system32\lsass.exe
C:\WINNT\system32\svchost.exe
C:\WINNT\system32\spoolsv.exe
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\WINNT\Q+lsaW5l\command.exe
C:\WINNT\System32\svchost.exe
C:\WINNT\system32\rundll32.exe
C:\WINNT\system32\wkssvr.exe
C:\WINNT\Explorer.exe
C:\Program Files\Network Monitor\netmon.exe
C:\WINNT\system32\regsvc.exe
C:\WINNT\system32\MSTask.exe
C:\WINNT\System32\WBEM\WinMgmt.exe
C:\Program Files\Real\RealPlayer\RealPlay.exe
C:\WINNT\system32\WinHelp.exe
C:\WINNT\System32\mspmspsv.exe
C:\dfndrff_14.exe
C:\kybrdff_17.exe
C:\WINNT\v1201.exe
C:\WINNT\system32\RUNDLL32.EXE
C:\nwnmff_17.exe
C:\WINNT\system32\internat.exe
C:\PROGRA~1\COMMON~1\iowi\iowim.exe
C:\WINNT\System32\svchost.exe
C:\PROGRA~1\COMMON~1\iowi\iowia.exe
C:\WINNT\System32\spool\DRIVERS\W32X86\3\E_SICN03.EXE
E:\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = searchbar.findthewebsiteyouneed.com
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = searchbar.findthewebsiteyouneed.com
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = searchbar.findthewebsiteyouneed.com
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = www.yahoo.fr/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = fr.rd.yahoo.com/customize/ie/defaults/stp/ymsgr6/fr/*fr.yahoo.com
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = fr.rd.yahoo.com/customize/ie/defaults/su/ymsgr6/fr/*fr.yahoo.com
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = fr.rd.yahoo.com/customize/ie/defaults/sb/ymsgr6/fr/*www.yahoo.com/ext/search/search.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = searchbar.findthewebsiteyouneed.com
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = fr.rd.yahoo.com/customize/ie/defaults/stp/ymsgr6/fr/*fr.yahoo.com
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = searchbar.findthewebsiteyouneed.com
R3 - URLSearchHook: (no name) - {02EE5B04-F144-47BB-83FB-A60BD91B74A9} - C:\Program Files\SurfSideKick 3\SskBho.dll
F2 - REG:system.ini: Shell=Explorer.exe wkssvr.exe
F2 - REG:system.ini: UserInit=C:\WINNT\system32\userinit.exe,wkssvr.exe
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINNT\System32\msdxm.ocx
O3 - Toolbar: &Yahoo! Companion - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\PROGRA~1\YAHOO!\COMPAN~1\INSTALLS\cpn\ycomp5_3_18_0.dll
O3 - Toolbar: Barre d'outils MSN - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Program Files\MSN Toolbar\01.01.2607.0\fr\msntb.dll
O4 - HKLM\..\Run: [Synchronization Manager] mobsync.exe /logon
O4 - HKLM\..\Run: [Windows Subsys] "C:\WINNT\system32\win32load.exe" rundll32.dll,loadsubsys,loadsys,win32
O4 - HKLM\..\Run: [Sustem] c:\winnt\system32\sus\explorer.exe
O4 - HKLM\..\Run: [NeroCheck] C:\WINNT\System32\NeroCheck.exe
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [RealTray] C:\Program Files\Real\RealPlayer\RealPlay.exe SYSTEMBOOTHIDEPLAYER
O4 - HKLM\..\Run: [WinHelp] C:\WINNT\system32\WinHelp.exe
O4 - HKLM\..\Run: [WinGate initialize] C:\WINNT\system32\WinGate.exe -remoteshell
O4 - HKLM\..\Run: [Remote Procedure Call Locator] RUNDLL32.EXE reg678.dll ondll_reg
O4 - HKLM\..\Run: [Program In Windows] C:\WINNT\system32\IEXPLORE.EXE
O4 - HKLM\..\Run: [defender] C:\\dfndrff_14.exe
O4 - HKLM\..\Run: [keyboard] C:\\kybrdff_17.exe
O4 - HKLM\..\Run: [ACTX1] C:\WINNT\v1201.exe
O4 - HKLM\..\Run: [uzrac43d] RUNDLL32.EXE w006f690.dll,n 003ac43a0000000a006f690
O4 - HKLM\..\Run: [newname] C:\\nwnmff_17.exe
O4 - HKLM\..\Run: [SurfSideKick 3] C:\Program Files\SurfSideKick 3\Ssk.exe
O4 - HKLM\..\Run: [ntdll.dll] C:\WINNT\system32\WinHelp.exe
O4 - HKLM\..\RunServices: [Windows Subsys] "C:\WINNT\system32\win32load.exe" rundll32.dll,loadsubsys,loadsys,win32
O4 - HKLM\..\RunServices: [Windows Kernel System Service] wkssvr.exe
O4 - HKLM\..\RunServices: [ntdll.dll] wkssvr.exe
O4 - HKCU\..\Run: [internat.exe] internat.exe
O4 - HKCU\..\Run: [Yahoo! Pager] C:\Program Files\Yahoo!\Messenger\ypager.exe -quiet
O4 - HKCU\..\Run: [iowi] C:\PROGRA~1\COMMON~1\iowi\iowim.exe
O4 - HKCU\..\Run: [SurfSideKick 3] C:\Program Files\SurfSideKick 3\Ssk.exe
O4 - HKCU\..\RunServices: [Windows Kernel System Service] wkssvr.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office10\OSA.EXE
O4 - Global Startup: EPSON Status Monitor 3 Environment Check.lnk = C:\WINNT\system32\spool\drivers\w32x86\3\E_SRCV03.EXE
O4 - Global Startup: CiDial 2.3.lnk = C:\Program Files\CiDial\CiDial.exe
O8 - Extra context menu item: &Search - kt.bar.need2find.com/KT/menusearch.html?p=KT
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O9 - Extra button: Real.com - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - C:\WINNT\System32\Shdocvw.dll
O9 - Extra button: Wanadoo - {1462651F-F4BA-4C76-A001-C4284D0FE16E} - www.wanadoo.fr (file missing) (HKCU)
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - et1cel93.spaces.msn.com//PhotoUpload/MsnPUpld.cab
O16 - DPF: {A17E30C4-A9BA-11D4-8673-60DB54C10000} (YahooYMailTo Class) - us.dl1.yimg.com/download.yahoo.com/dl/installs/essentials/ymmapi_0727.dll
O18 - Filter: text/html - {2AB289AE-4B90-4281-B2AE-1F4BB034B647} - C:\PROGRA~1\RXTOOL~1\sfcont.dll
O20 - Winlogon Notify: IPConfMSP - C:\WINNT\system32\jt4s07h7e.dll
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - Unknown owner - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - Unknown owner - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - Unknown owner - C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe" /service (file missing)
O23 - Service: avast! Web Scanner - Unknown owner - C:\Program Files\Alwil Software\Avast4\ashWebSv.exe" /service (file missing)
O23 - Service: Command Service (cmdService) - Unknown owner - C:\WINNT\Q+lsaW5l\command.exe
O23 - Service: Logical Disk Manager Administrative Service (dmadmin) - VERITAS Software Corp. - C:\WINNT\System32\dmadmin.exe
O23 - Service: ll_reg - Unknown owner - Rundll32.exe (file missing)
O23 - Service: Microsoft NetWork FireWall Services - Unknown owner - C:\WINNT\SYSTEM32\NetServices.exe
O23 - Service: NetMeeting Remote Desktop (RPC) Sharing - Unknown owner - Rundll32.exe (file missing)
O23 - Service: Network Monitor - Unknown owner - C:\Program Files\Network Monitor\netmon.exe
O23 - Service: PSEXESVC - Sysinternals - C:\WINNT\System32\PSEXESVC.EXE
O23 - Service: Windows Management Instrumentation Driver Extension - Unknown owner - C:\WINNT\system32\WinDriver.exe

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Merci de votre aide éventuelle.