Virus casse cou....!!

Bonjour à tous, depuis ce matin en allumant l'ordi j'ai apparemment chopé un virus ou autre qui me fou un bordel monstre dans l'ordi alors voilà un rapport si quelqun peut me filer un coup de main!
merci d'avance

Logfile of HijackThis v1.99.1
Scan saved at 09:57:26, on 13/03/2006
Platform: Windows XP (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2600.0000)

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\Explorer.EXE
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\soundman.exe
C:\WINDOWS\System32\atiptaxx.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
C:\Program Files\Microsoft ActiveSync\WCESCOMM.EXE
C:\WINDOWS\System32\drivers\CDAC11BA.EXE
C:\Program Files\Fichiers communs\Microsoft Shared\VS7Debug\mdm.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
E:\Office10\OUTLOOK.EXE
C:\Program Files\Microsoft Office\Office10\WINWORD.EXE
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Microsoft Office\Office10\EXCEL.EXE
E:\taxe\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://g.msn.fr/0SEFRFR/SAOS02
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = www.yahoo.fr
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.tiscali.fr/
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
F2 - REG:system.ini: UserInit=C:\WINDOWS\System32\Userinit.exe
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.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\01.02.4000.1001\fr\msntb.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: MSN - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Program Files\MSN Apps\MSN Toolbar\01.02.4000.1001\fr\msntb.dll
O4 - HKLM\..\Run: [SoundMan] soundman.exe
O4 - HKLM\..\Run: [AtiPTA] atiptaxx.exe
O4 - HKLM\..\Run: [NeroCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [CloneCDTray] "C:\Program Files\SlySoft\CloneCD\CloneCDTray.exe" /s
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [Symantec NetDriver Monitor] C:\PROGRA~1\SYMNET~1\SNDMon.exe /Consumer
O4 - HKLM\..\Run: [ccApp] "C:\Program Files\Fichiers communs\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [SSC_UserPrompt] C:\Program Files\Fichiers communs\Symantec Shared\Security Center\UsrPrmpt.exe
O4 - HKLM\..\Run: [IS CfgWiz] C:\Program Files\Norton Internet Security\cfgwiz.exe /GUID {257BBC47-1B26-432e-9F84-188603799DD3} /MODE CfgWiz /CMDLINE "REBOOT"
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [Power Scan] "C:\Program Files\Power Scan\powerscan.exe" /aid:1004174
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [BoontyBox] "C:\Program Files\Boonty\BoontyBox\BoontyBox.exe" /boot
O4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
O4 - HKCU\..\Run: [H/PC Connection Agent] "C:\Program Files\Microsoft ActiveSync\WCESCOMM.EXE"
O4 - HKCU\..\Run: [msnmsgr] "C:\Program Files\MSN Messenger\msnmsgr.exe" /background
O4 - HKCU\..\Run: [Steam] "e:\valve\steam\steam.ex" -silent
O4 - Global Startup: Lancement rapide d'Adobe Reader.lnk = C:\Program Files\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office10\OSA.EXE
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O9 - Extra button: Créer un Favori de l'appareil mobile - {2EAF5BB1-070F-11D3-9307-00C04FAE2D4F} - C:\Program Files\Microsoft ActiveSync\INetRepl.dll
O9 - Extra button: (no name) - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - C:\Program Files\Microsoft ActiveSync\INetRepl.dll
O9 - Extra 'Tools' menuitem: Créer un Favori de l'appareil mobile... - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - C:\Program Files\Microsoft ActiveSync\INetRepl.dll
O9 - Extra button: @sysiecom.dll,-2100 - {703436F1-3E1F-11d3-8F6B-00105A2A1D59} - C:\Program Files\Systran\Classic3.0\MenuTranslate.html
O9 - Extra 'Tools' menuitem: @sysiecom.dll,-2102 - {703436F1-3E1F-11d3-8F6B-00105A2A1D59} - C:\Program Files\Systran\Classic3.0\MenuTranslate.html
O9 - Extra button: @sysiecom.dll,-2103 - {703436F2-3E1F-11d3-8F6B-00105A2A1D59} - C:\Program Files\Systran\Classic3.0\MenuTranslateAll.html
O9 - Extra 'Tools' menuitem: @sysiecom.dll,-2105 - {703436F2-3E1F-11d3-8F6B-00105A2A1D59} - C:\Program Files\Systran\Classic3.0\MenuTranslateAll.html
O9 - Extra button: @sysiecom.dll,-2115 - {703436F3-3E1F-11d3-8F6B-00105A2A1D59} - C:\Program Files\Systran\Classic3.0\MenuConfigure.html
O9 - Extra 'Tools' menuitem: @sysiecom.dll,-2117 - {703436F3-3E1F-11d3-8F6B-00105A2A1D59} - C:\Program Files\Systran\Classic3.0\MenuConfigure.html
O9 - Extra button: (no name) - {703436F4-3E1F-11d3-8F6B-00105A2A1D59} - C:\Program Files\Systran\Classic3.0\MenuClearCache.html
O9 - Extra 'Tools' menuitem: @sysiecom.dll,-2108 - {703436F4-3E1F-11d3-8F6B-00105A2A1D59} - C:\Program Files\Systran\Classic3.0\MenuClearCache.html
O9 - Extra button: (no name) - {703436F5-3E1F-11d3-8F6B-00105A2A1D59} - C:\Program Files\Systran\Classic3.0\MenuRegister.html
O9 - Extra 'Tools' menuitem: @sysiecom.dll,-2111 - {703436F5-3E1F-11d3-8F6B-00105A2A1D59} - C:\Program Files\Systran\Classic3.0\MenuRegister.html
O9 - Extra button: (no name) - {703436F6-3E1F-11d3-8F6B-00105A2A1D59} - C:\Program Files\Systran\Classic3.0\MenuUpdates.html (file missing)
O9 - Extra 'Tools' menuitem: @sysiecom.dll,-2114 - {703436F6-3E1F-11d3-8F6B-00105A2A1D59} - C:\Program Files\Systran\Classic3.0\MenuUpdates.html (file missing)
O9 - Extra button: (no name) - {85d1f590-48f4-11d9-9669-0800200c9a66} - %windir%\bdoscandel.exe (file missing)
O9 - Extra 'Tools' menuitem: Uninstall BitDefender Online Scanner v8 - {85d1f590-48f4-11d9-9669-0800200c9a66} - %windir%\bdoscandel.exe (file missing)
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) -
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: C-DillaCdaC11BA - Macrovision - C:\WINDOWS\System32\drivers\CDAC11BA.EXE