Ordinateur infecté... je ne sais plus quoi fa

je vous transmest le log de hijackthis, mon ordinateur bug sans arret : fenetre de boite email s'ouvre, message de scan par logiciel, lenteur incroyable, merci de votre aide.
Flodrum

Logfile of HijackThis v1.99.1
Scan saved at 19:56:07, on 30/03/2007
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\spoolsv.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Program Files\Microsoft Office\Office\OSA.EXE
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpohmr08.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpotdd01.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpoevm08.exe
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\HPZipm12.exe
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\Bin\hpoSTS08.exe
C:\WINDOWS\mui\explorer.exe
C:\WINDOWS\explorer.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\WINDOWS\system32\wuauclt.exe
C:\WINDOWS\system32\wuauclt.exe
C:\DOCUME~1\Flo\LOCALS~1\Temp\23exym50_2.5.exe
C:\Program Files\QuickZip4\QuickZip.exe
C:\Documents and Settings\Flo\Bureau\virus\HijackThis.exe
C:\PROGRA~1\MOZILL~1\THUNDE~1.EXE

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = about:blank
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = about:blank
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = about:blank
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.google.fr/?gws_rd=ssl
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = about:blank
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = about:blank
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page = about:blank
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page = about:blank
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: (no name) - {215EBF16-0EF7-732D-F4ED-05D58C75BBEF} - C:\WINDOWS\system32\qcqcyl.dll (file missing)
R3 - URLSearchHook: (no name) - {A89B22E0-CA5E-9CFB-7871-CA891B28609C} - C:\WINDOWS\system32\mgsiomta.dll (file missing)
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: (no name) - {215EBF16-0EF7-732D-F4ED-05D58C75BBEF} - C:\WINDOWS\system32\qcqcyl.dll (file missing)
O2 - BHO: (no name) - {A89B22E0-CA5E-9CFB-7871-CA891B28609C} - C:\WINDOWS\system32\mgsiomta.dll (file missing)
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\System32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [nxla2d40] RUNDLL32.EXE w01ce32a.dll,n 001a2d3f0000000a01ce32a
O4 - HKLM\..\Run: [nwiz] nwiz.exe /installquiet
O4 - HKLM\..\Run: [.nvsvc] C:\WINDOWS\system\smss.exe /w
O4 - HKLM\..\Run: [virus] C:\WINDOWS\system32\virus1.exe
O4 - HKCU\..\Run: [Rwtt] "C:\PROGRA~1\CROSOF~1\tracert.exe" -vt yazr
O4 - Global Startup: Démarrage d'Office.lnk = C:\Program Files\Microsoft Office\Office\OSA.EXE
O4 - Global Startup: hp psc 1000 series.lnk = ?
O4 - Global Startup: hpoddt01.exe.lnk = ?
O4 - Global Startup: Microsoft Recherche accélérée.lnk = C:\Program Files\Microsoft Office\Office\FINDFAST.EXE
O9 - Extra button: (no name) - {12345678-1234-1234-1234-1234567890AB} - (no file)
O16 - DPF: {09C21411-B9A2-4DE6-8416-4E3B58577BE0} (France Telecom MDM ActiveX Control) - http://minitelweb.minitel.com/imin_data/ocx/MDM.cab
O16 - DPF: {09F1ADAC-76D8-4D0F-99A5-5C907DADB988} - http://fr.systemdoctor.com/download/2006/cab/SystemDoctor2006FreeInstall_fr.cab
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/...
O17 - HKLM\System\CCS\Services\Tcpip\..\{8EDBA988-607A-497A-A8B6-E3DFE494AB10}: NameServer = 212.27.32.176,212.27.32.177
O20 - Winlogon Notify: policies - C:\WINDOWS\system32\j8l40i3qe8.dll (file missing)
O20 - Winlogon Notify: Telephony - C:\WINDOWS\system32\guard.tmp (file missing)
O20 - Winlogon Notify: WgaLogon - C:\WINDOWS\SYSTEM32\WgaLogon.dll
O20 - Winlogon Notify: winjrs32 - winjrs32.dll (file missing)
O21 - SSODL: WPDShServiceObj - {AAA288BA-9A4C-45B0-95D7-94D524869DB5} - C:\WINDOWS\system32\WPDShServiceObj.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: DirectX Service (DirectQybb) - Unknown owner - C:\WINDOWS\system32\directx.exe
O23 - Service: NVIDIA Driver Helper Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe