Analyse log Hijack This

Bonjour

On m'a donné pour bosser un pc infecté de virus et toute autre sale bête du même genre.
J'ai nettoyé à grand coups de Spybot, Ad Aware et Clean UP, mais j'ai toujours des problèmes.
Je n'arrive pas à lancer une analyse antivirus (Norton Corporate Edition)
Pourriez vous analyser ce log d'Hijack this s'il vous plaît !

Merci :)

Logfile of HijackThis v1.99.1
Scan saved at 12:27:53, on 22/12/2005
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\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\qirgdf.exe
C:\WINDOWS\Explorer.exe
C:\Documents and Settings\Thierry\Bureau\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.fr/
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
F2 - REG:system.ini: Shell=Explorer.exe C:\WINDOWS\Nail.exe
O1 - Hosts: 64.91.255.87 www.dcsresearch.com
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 5.0\Acrobat\ActiveX\AcroIEHelper.ocx
O2 - BHO: Scriptlet.Tools - {3E4563A4-2A9B-4912-BE38-906A0CB702CC} - C:\DOCUME~1\ALLUSE~1\APPLIC~1\Tools\tools.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: ohb - {98640C3B-0699-4D51-ADB4-A6FC48ACB966} - C:\WINDOWS\system32\nsf4E.dll
O2 - BHO: Scriptlet.Tools - {EEBA788A-C268-492A-B7FE-42C2B6C553D4} - C:\DOCUME~1\ALLUSE~1\APPLIC~1\Bin\bin.dll
O4 - HKLM\..\Run: [vptray] C:\PROGRA~1\SYMANT~1\SYMANT~1\vptray.exe
O4 - HKLM\..\Run: [NeroCheck] C:\WINDOWS\System32\NeroCheck.exe
O4 - HKLM\..\Run: [wtqlxiv] c:\windows\system32\czjpqlc.exe
O4 - HKLM\..\Run: [\1.exe] C:\DOCUME~1\ALLUSE~1\APPLIC~1\Tools\1.exe
O4 - HKLM\..\Run: [EPSON Stylus Photo R300 Series] C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_S4I0F2.EXE /P30 "EPSON Stylus Photo R300 Series" /O6 "USB001" /M "Stylus Photo R300"
O4 - HKLM\..\Run: [byjkoa] C:\WINDOWS\system32\qirgdf.exe r
O4 - HKLM\..\RunServices: [\1.exe] C:\DOCUME~1\ALLUSE~1\APPLIC~1\Tools\1.exe
O4 - HKCU\..\Run: [Skype] "C:\Program Files\Skype\Phone\Skype.exe" /nosplash /minimized
O4 - HKCU\..\Run: [\1.exe] C:\DOCUME~1\ALLUSE~1\APPLIC~1\Tools\1.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office\OSA9.EXE
O4 - Global Startup: Acrobat Assistant.lnk = C:\Program Files\Adobe\Acrobat 5.0\Distillr\AcroTray.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://by16fd.bay16.hotmail.msn.com/resources/MsnPUpld.cab
O16 - DPF: {99802379-7362-40E2-9D28-8A3B9AF880B7} - http://hotsearchbar.com/toolbar2/winhot32.cab
O16 - DPF: {DE910060-8EFB-44B9-B492-75180696643F} (iiittt Class) - http://www.hotsearchbar.com/toolbar30/hsrb.cab
O16 - DPF: {FC67BB52-AAB6-4282-9D51-2DAFFE73AFD0} - http://download.spamextract.com/sx/SpEx2.102995pur_opt/SpamExtractWebInstall.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{153DC66F-34E7-4579-80A2-BDD2E0451AA8}: NameServer = 194.2.0.20,194.2.0.50
O17 - HKLM\System\CCS\Services\Tcpip\..\{D8AB9015-AA3A-4545-8BB9-95B9E84F7918}: NameServer = 194.2.0.20,194.2.0.50
O20 - Winlogon Notify: NavLogon - C:\WINDOWS\System32\NavLogon.dll
O23 - Service: DefWatch - Symantec Corporation - C:\PROGRA~1\SYMANT~1\SYMANT~1\DefWatch.exe
O23 - Service: Symantec AntiVirus Client (Norton AntiVirus Server) - Symantec Corporation - C:\PROGRA~1\SYMANT~1\SYMANT~1\Rtvscan.exe
O23 - Service: NVIDIA Driver Helper Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe
O23 - Service: System Startup Service (SvcProc) - Unknown owner - C:\WINDOWS\svcproc.exe