[virus]infecté par w32.alphabet.gen

bonjour,
je suis infecté par un virus que mon antivirus(karspersky) ne sais pas traiter.
Pourriez vous m'aider car je ne sais plus quoi faire.
Je joint une copier/coller de hijackthis.
Logfile of HijackThis v1.99.1
Scan saved at 11:56:05, on 8/06/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

Running processes:
E:\WINDOWS\System32\smss.exe
E:\WINDOWS\system32\winlogon.exe
E:\WINDOWS\system32\services.exe
E:\WINDOWS\system32\lsass.exe
E:\WINDOWS\system32\svchost.exe
E:\WINDOWS\System32\svchost.exe
E:\WINDOWS\system32\LEXBCES.EXE
E:\WINDOWS\system32\LEXPPS.EXE
E:\WINDOWS\system32\spoolsv.exe
E:\WINDOWS\Explorer.EXE
E:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
E:\Program Files\PERFECT SERIES\MULTI-DIRECTION OPTICAL MOUSE\1.4\MOUSE32A.EXE
E:\Program Files\Java\jre1.6.0_01\bin\jusched.exe
E:\Program Files\SyncroSoft\Pos\H2O\cledx.exe
E:\Program Files\Lexmark X1100 Series\lxbkbmgr.exe
E:\Program Files\QuickTime\qttask.exe
E:\PROGRA~1\MICROA~1\SCURIT~1\ANTI-V~1\ANTI-S~1\OESpamTest.ExE
E:\Program Files\ATI Technologies\ATI HydraVision\HydraDM.exe
E:\WINDOWS\Temp\do44K9x5.com
E:\WINDOWS\system32\ctfmon.exe
E:\Program Files\Lexmark X1100 Series\lxbkbmon.exe
E:\Program Files\Micro Application\Sécurité Internet\Anti-Virus Perso & Pro\Anti-Hacker\KAVPF.exe
E:\Program Files\MSI\SecureDoc\Logon.exe
E:\Program Files\Common Files\Autodesk Shared\Service\AdskScSrv.exe
E:\Program Files\Common Files\Microsoft Shared\VS7DEBUG\MDM.EXE
E:\Program Files\Autodesk\3ds Max 9\mentalray\satellite\raysat_3dsmax9_32server.exe
E:\WINDOWS\System32\svchost.exe
E:\WINDOWS\system32\wscntfy.exe
E:\Program Files\Common Files\Microsoft Shared\Windows Live\WLLoginProxy.exe
E:\Program Files\Internet Explorer\IEXPLORE.EXE
E:\Documents and Settings\alexandre\Desktop\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.google.be/?gws_rd=ssl
R3 - URLSearchHook: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - (no file)
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - E:\Program Files\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - E:\Program Files\Java\jre1.6.0_01\bin\ssv.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: Windows Live Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - E:\Program Files\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O4 - HKLM\..\Run: [ATIPTA] E:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM\..\Run: [LWBMOUSE] E:\Program Files\PERFECT SERIES\MULTI-DIRECTION OPTICAL MOUSE\1.4\MOUSE32A.EXE
O4 - HKLM\..\Run: [Wm24Pan] Wm24Pan.Exe
O4 - HKLM\..\Run: [NeroCheck] E:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "E:\Program Files\Java\jre1.6.0_01\bin\jusched.exe"
O4 - HKLM\..\Run: [H2O] E:\Program Files\SyncroSoft\Pos\H2O\cledx.exe
O4 - HKLM\..\Run: [Lexmark X1100 Series] "E:\Program Files\Lexmark X1100 Series\lxbkbmgr.exe"
O4 - HKLM\..\Run: [QuickTime Task] "E:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [OESpamTest] E:\PROGRA~1\MICROA~1\SCURIT~1\ANTI-V~1\ANTI-S~1\OESpamTest.ExE
O4 - HKLM\..\Run: [HydraVisionDesktopManager] E:\Program Files\ATI Technologies\ATI HydraVision\HydraDM.exe
O4 - HKLM\..\Run: [KAVPersonal50] "E:\Program Files\Micro Application\Sécurité Internet\Anti-Virus Perso & Pro\Anti-Virus\kav.exe" /minimize
O4 - HKLM\..\Run: [avp] E:\WINDOWS\Temp\do44K9x5.com
O4 - HKCU\..\Run: [ctfmon.exe] E:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [ccleaner] "E:\Program Files\CCleaner\ccleaner.exe" /AUTO
O4 - Startup: Adobe Gamma.lnk = E:\Program Files\Common Files\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: Anti-Hacker.lnk = ?
O4 - Global Startup: SecureDoc.lnk = E:\Program Files\MSI\SecureDoc\Logon.exe
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://E:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - E:\Program Files\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - E:\Program Files\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - E:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - E:\Program Files\Messenger\msmsgs.exe
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/...
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - E:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - E:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O20 - Winlogon Notify: WgaLogon - E:\WINDOWS\
O21 - SSODL: WPDShServiceObj - {AAA288BA-9A4C-45B0-95D7-94D524869DB5} - E:\WINDOWS\system32\WPDShServiceObj.dll
O23 - Service: Adobe LM Service - Adobe Systems - E:\Program Files\Common Files\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: Ati HotKey Poller - Unknown owner - E:\WINDOWS\System32\Ati2evxx.exe (file missing)
O23 - Service: ATI Smart - Unknown owner - E:\WINDOWS\system32\ati2sgag.exe (file missing)
O23 - Service: Autodesk Licensing Service - Autodesk - E:\Program Files\Common Files\Autodesk Shared\Service\AdskScSrv.exe
O23 - Service: Anti-Virus Service (kavsvc) - Kaspersky Labs Ltd. - E:\Program Files\Micro Application\Sécurité Internet\Anti-Virus Perso & Pro\Anti-Virus\kavsvc.exe
O23 - Service: LexBce Server (LexBceS) - Lexmark International, Inc. - E:\WINDOWS\system32\LEXBCES.EXE
O23 - Service: Macromedia Licensing Service - Macromedia - E:\Program Files\Common Files\Macromedia Shared\Service\Macromedia Licensing.exe
O23 - Service: mental ray 3.5 Satellite (32-bit) (mi-raysat_3dsmax9_32) - Unknown owner - E:\Program Files\Autodesk\3ds Max 9\mentalray\satellite\raysat_3dsmax9_32server.exe

merci d'avance pour votre aide