S.V.P! COMMENT SUPPRIMER MON VIRUS!!

BONJOUR !
j'ai plusieur virus dans mon p.c mais je ne sais pas
comment les suprimer définitivement!
VOICI LE RAPORT PAR "HIJACKTHIS":

Logfile of HijackThis v1.99.1
Scan saved at 18:54:08, on 28/06/2007
Platform: Windows XP (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 (6.00.2600.0000)

Running processes:
D:\WINDOWS\System32\smss.exe
D:\WINDOWS\System32\winlogon.exe
D:\WINDOWS\system32\services.exe
D:\WINDOWS\system32\lsass.exe
D:\WINDOWS\system32\svchost.exe
D:\WINDOWS\System32\svchost.exe
D:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
D:\Program Files\Alwil Software\Avast4\ashServ.exe
D:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
D:\Program Files\Alwil Software\Avast4\ashWebSv.exe
D:\WINDOWS\system32\spoolsv.exe
D:\WINDOWS\Explorer.EXE
D:\Program Files\ZyDAS Technology Corporation\ZyDAS_802.11g_Utility\ZDWlan.exe
D:\Program Files\Fichiers communs\Microsoft Shared\VS7Debug\mdm.exe
D:\WINDOWS\System32\svchost.exe
d:\progra~1\intern~1\iexplore.exe
D:\Program Files\Internet Explorer\iexplore.exe
D:\WINDOWS\System32\wuauclt.exe
D:\Program Files\MSN Messenger\msnmsgr.exe
D:\Program Files\MSN Messenger\livecall.exe
D:\WINDOWS\System32\LVComsX.exe
D:\PROGRA~1\MOZILL~1\FIREFOX.EXE
D:\Program Files\Alwil Software\Avast4\ashSimpl.exe
D:\Documents and Settings\majid papa\Local Settings\Temp\Répertoire temporaire 1 pour hijackthis.zip\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = https://www.bing.com/?cc=fr&toHttps=1&redig=D4322FEE7CF74A348CB9CE970F098EF5
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = https://www.bing.com/?FORM=TOOLBR&cc=fr&toHttps=1&redig=4527FFF1C12746FC9EDB535C75E80ECC
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://home.sweetim.com/
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = https://home.sweetim.com/
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = https://www.bing.com/?FORM=TOOLBR&cc=fr&toHttps=1&redig=4527FFF1C12746FC9EDB535C75E80ECC
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: SweetIM For Internet Explorer - {BC4FFE41-DE9F-46fa-B455-AAD49B9F9938} - D:\Program Files\Macrogaming\SweetIMBarForIE\toolbar.dll (file missing)
O2 - BHO: SWEETIE - {1A0AADCD-3A72-4b5f-900F-E3BB5A838E2A} - D:\PROGRA~1\MACROG~1\SWEETI~1\toolbar.dll (file missing)
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - D:\Program Files\Java\jre1.5.0_11\bin\ssv.dll
O2 - BHO: Windows Live Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - D:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - D:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: &Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - D:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O3 - Toolbar: SweetIM For Internet Explorer - {BC4FFE41-DE9F-46fa-B455-AAD49B9F9938} - D:\Program Files\Macrogaming\SweetIMBarForIE\toolbar.dll (file missing)
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKCU\..\Run: [list help] D:\DOCUME~1\MAJIDP~1\APPLIC~1\AIMJUM~1\Longpurefive.exe
O4 - Global Startup: ZDWLan Utility.lnk = D:\Program Files\ZyDAS Technology Corporation\ZyDAS_802.11g_Utility\ZDWlan.exe
O8 - Extra context menu item: E&xport to Microsoft Excel - res://D:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://D:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - D:\Program Files\Java\jre1.5.0_11\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - D:\Program Files\Java\jre1.5.0_11\bin\ssv.dll
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - D:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Related - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - D:\WINDOWS\web\related.htm
O9 - Extra 'Tools' menuitem: Show &Related Links - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - D:\WINDOWS\web\related.htm
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - D:\Program Files\Messenger\MSMSGS.EXE
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - D:\Program Files\Messenger\MSMSGS.EXE
O16 - DPF: {00B71CFB-6864-4346-A978-C0A14556272C} (Checkers Class) - http://messenger.zone.msn.com/binary/msgrchkr.cab31267.cab
O16 - DPF: {09F1ADAC-76D8-4D0F-99A5-5C907DADB988} - http://cdn.downloadcontrol.com/files/installers/cab/SystemDoctor2006FreeInstall_fr.cab
O16 - DPF: {14B87622-7E19-4EA8-93B3-97215F77A6BC} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab31267.cab
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://download.microsoft.com/download/E/5/6/E5611B10-0D6D-4117-8430-A67417AA88CD/LegitCheckControl.cab
O16 - DPF: {2917297F-F02B-4B9D-81DF-494B6333150B} (Minesweeper Flags Class) - http://messenger.zone.msn.com/binary/MineSweeper.cab31267.cab
O16 - DPF: {5C051655-FCD5-4969-9182-770EA5AA5565} (Solitaire Showdown Class) - http://messenger.zone.msn.com/binary/SolitaireShowdown.cab56986.cab
O16 - DPF: {5D6F45B3-9043-443D-A792-115447494D24} (UnoCtrl Class) - http://messenger.zone.msn.com/FR-FR/a-UNO1/GAME_UNO1.cab
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsClient.cab31267.cab
O16 - DPF: {C3F79A2B-B9B4-4A66-B012-3EE46475B072} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab56907.cab
O16 - DPF: {F6BF0D00-0B2A-4A75-BF7B-F385591623AF} (Solitaire Showdown Class) - http://messenger.zone.msn.com/binary/SolitaireShowdown.cab31267.cab
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - D:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - D:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O20 - Winlogon Notify: WgaLogon - WgaLogon.dll (file missing)
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - D:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - ALWIL Software - D:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - Unknown owner - D:\Program Files\Alwil Software\Avast4\ashMaiSv.exe" /service (file missing)
O23 - Service: avast! Web Scanner - Unknown owner - D:\Program Files\Alwil Software\Avast4\ashWebSv.exe" /service (file missing)
O23 - Service: Boonty Games - BOONTY - D:\Program Files\Fichiers communs\BOONTY Shared\Service\Boonty.exe

MERCI D'AVANCE POUR VOS REPONSE!!!