[WIN32:Trojan-gen] - Infections récurrentes

Bonjour à tous.

Depuis quelques jours, Avast me détecte chaque jour un nouveau trojan, qu'il m'efface, mais ça revient tous les jours, sous des noms différents (WIN32:Trojan-gen, Win32:VBStat-C, Win32:BHO-BS). Je fais pourtant au maximum tous les 2 jours (enfin nuits...) un scan en mode sans échec avec Kaspersky (mwavscan.com, après mise à jour des bases), ainsi que des scans en ligne avec bitdefender (sous Internet Explorer).

Voilou, si quelqu'un pouvait m'aider...

Pour info, voilà mon dernier log Hijackthis

D'avance merci

Tonio

Logfile of HijackThis v1.99.1
Scan saved at 10:36:07, on 23/03/2007
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

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:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\Program Files\Fichiers communs\LightScribe\LSSrvc.exe
C:\Program Files\Analog Devices\SoundMAX\SMAgent.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
C:\Program Files\Apoint2K\Apoint.exe
C:\WINDOWS\System32\sistray.EXE
C:\WINDOWS\System32\taskmgr.exe
C:\WINDOWS\System32\khooker.exe
C:\WINDOWS\AGRSMMSG.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Program Files\Apoint2K\Apntex.exe
C:\Program Files\Apoint2K\HidFind.exe
C:\Program Files\Sunbelt Software\Personal Firewall\kpf4ss.exe
C:\Program Files\Sunbelt Software\Personal Firewall\kpf4gui.exe
C:\Program Files\Sunbelt Software\Personal Firewall\kpf4gui.exe
C:\Program Files\Mozilla Thunderbird\thunderbird.exe
C:\Program Files\Microsoft Office\Office\WINWORD.EXE
C:\PROGRA~1\MOZILL~1\FIREFOX.EXE
C:\Program Files\Microsoft Office\Office\EXCEL.EXE
C:\Utilitaires\Desinfectant\hijackthis_199\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Apps\Adobe\Acrobat 5.1\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: (no name) - {4B50DEB2-891B-4CEE-A06C-144207F4015E} - C:\WINDOWS\system32\cbxurop.dll
O2 - BHO: (no name) - {CB999281-1E72-4041-BDE2-8B80B577E14F} - C:\WINDOWS\System32\iifef.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O4 - HKLM\..\Run: [Apoint] C:\Program Files\Apoint2K\Apoint.exe
O4 - HKLM\..\Run: [SiSUSBRG] C:\WINDOWS\SiSUSBrg.exe
O4 - HKLM\..\Run: [SiS Tray] C:\WINDOWS\System32\sistray.EXE
O4 - HKLM\..\Run: [SiS KHooker] C:\WINDOWS\System32\khooker.exe
O4 - HKLM\..\Run: [AGRSMMSG] AGRSMMSG.exe
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [SoundService] rundll32.exe "C:\WINDOWS\System32\mrdbdebd.dll",setvm
O4 - Global Startup: Adobe Gamma Loader.lnk = C:\Program Files\Fichiers communs\Adobe\Calibration\Adobe Gamma Loader.exe
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O8 - Extra context menu item: &Clean Traces - C:\Program Files\DAP\Privacy Package\dapcleanerie.htm
O8 - Extra context menu item: &Download with &DAP - C:\Program Files\DAP\dapextie.htm
O8 - Extra context menu item: Download &all with DAP - C:\Program Files\DAP\dapextie2.htm
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)
O14 - IERESET.INF: START_PAGE_URL=https://www.free.fr/freebox/index.html
O16 - DPF: {0EB0E74A-2A76-4AB3-A7FB-9BD8C29F7F75} (CKAVWebScan Object) - https://www.kaspersky.fr/?domain=webscanner.kaspersky.fr
O16 - DPF: {5D86DDB5-BDF9-441B-9E9E-D4730F4EE499} (BDSCANONLINE Control) - http://download.bitdefender.com/resources/scan8/oscan8.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/...
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/...
O16 - DPF: {92E7E45A-D8C8-480E-AF99-176E43997CAA} (Aurigma Image Uploader 3.5 Combo Control) - http://www.pixdiscount.fr/clients/ImageUploader3.cab
O16 - DPF: {A3009861-330C-4E10-822B-39D16EC8829D} (CRAVOnline Object) - http://www.ravantivirus.com/scan/ravonline.cab
O16 - DPF: {BB21F850-63F4-4EC9-BF9D-565BD30C9AE9} (ASquaredScanForm Element) - http://techgenix.com/security/
O16 - DPF: {C942A79B-01ED-47EE-9DAA-1EFAA70DAB8E} (VacPro.int_ver22b) - http://www.muiegaozsicur.com/ocx/intES_ver22b.CAB
O16 - DPF: {CE3409C4-9E26-4F8E-83E4-778498F9E7B4} (PB_Uploader Class) - http://www.pixdiscount.fr/clients/uploader_v2.1.0.53.cab
O20 - Winlogon Notify: cbxurop - C:\WINDOWS\SYSTEM32\cbxurop.dll
O20 - Winlogon Notify: iifef - C:\WINDOWS\System32\iifef.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: avgav.exe (AVG) - Unknown owner - C:\WINDOWS\avgav.exe (file missing)
O23 - Service: Sunbelt Kerio Personal Firewall 4 (KPF4) - Sunbelt Software - C:\Program Files\Sunbelt Software\Personal Firewall\kpf4ss.exe
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Hewlett-Packard Company - C:\Program Files\Fichiers communs\LightScribe\LSSrvc.exe
O23 - Service: SoundMAX Agent Service (SoundMAX Agent Service (default)) - Analog Devices, Inc. - C:\Program Files\Analog Devices\SoundMAX\SMAgent.exe