J'ai bien la ligne de dumpreg.exe dans le log mais lors du nettoyage avec hijhackthis l'executable la n'apparait pas dans la liste a cocher 
Voici le log de hijhack :
Logfile of HijackThis v1.99.1
Scan saved at 22:19:09, on 14/04/2005
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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\TGTSoft\StyleXP\StyleXPService.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\PROGRA~1\Grisoft\AVG7\avgamsvr.exe
C:\PROGRA~1\Grisoft\AVG7\avgupsvc.exe
C:\WINDOWS\dumpreg.exe
C:\Program Files\Serv-U\ServUDaemon.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\D-Tools\daemon.exe
C:\Program Files\SlySoft\AnyDVD\AnyDVD.exe
C:\Program Files\DU Meter\DUMeter.exe
C:\PROGRA~1\Grisoft\AVG7\avgcc.exe
C:\PROGRA~1\Grisoft\AVG7\avgemc.exe
C:\Program Files\Alcatel\SpeedTouch USB\Dragdiag.exe
C:\Program Files\MSN Messenger\MsnMsgr.Exe
C:\Program Files\Serv-U\ServUTray.exe
C:\Program Files\NWNK-iRC\mirc.exe
C:\WINDOWS\System32\devldr32.exe
C:\Program Files\Zone Labs\ZoneAlarm\zlclient.exe
C:\WINDOWS\system32\ZoneLabs\vsmon.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Program Files\Steam\Steam.exe
C:\Program Files\FlashFXP\flashfxp.exe
C:\WINDOWS\System32\RUNDLL32.exe
C:\WINDOWS\System32\RUNDLL32.exe
C:\WINDOWS\system32\notepad.exe
C:\PROGRA~1\MOZILL~1\FIREFOX.EXE
C:\Program Files\WinRAR\WinRAR.exe
C:\DOCUME~1\Sixpack\LOCALS~1\Temp\Rar$EX00.391\HijackThis.exe
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O4 - HKLM\..\Run: [DAEMON Tools-1033] "C:\Program Files\D-Tools\daemon.exe" -lang 1033
O4 - HKLM\..\Run: [AnyDVD] C:\Program Files\SlySoft\AnyDVD\AnyDVD.exe
O4 - HKLM\..\Run: [DU Meter] C:\Program Files\DU Meter\DUMeter.exe
O4 - HKLM\..\Run: [AVG7_CC] C:\PROGRA~1\Grisoft\AVG7\avgcc.exe /STARTUP
O4 - HKLM\..\Run: [AVG7_EMC] C:\PROGRA~1\Grisoft\AVG7\avgemc.exe
O4 - HKLM\..\Run: [SpeedTouch USB Diagnostics] "C:\Program Files\Alcatel\SpeedTouch USB\Dragdiag.exe" /icon
O4 - HKLM\..\Run: [Zone Labs Client] "C:\Program Files\Zone Labs\ZoneAlarm\zlclient.exe"
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [ServUTrayIcon] C:\Program Files\Serv-U\ServUTray.exe
O4 - Global Startup: Adobe Gamma Loader.lnk = C:\Program Files\Fichiers communs\Adobe\Calibration\Adobe Gamma Loader.exe
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_01\bin\npjpi150_01.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_01\bin\npjpi150_01.dll
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)
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O16 - DPF: {5D86DDB5-BDF9-441B-9E9E-D4730F4EE499} (BDSCANONLINE Control) - http://www.informatique-pratique.be/scan8/oscan8.cab
O16 - DPF: {9A9307A0-7DA4-4DAF-B042-5009F29E09E1} (ActiveScan Installer Class) - http://www.pandasoftware.com/activescan/as5/asinst.cab
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/ [...] loader.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{813782AD-11DB-4A73-9A73-C87B42E6BFEB}: NameServer = 195.95.38.131 195.95.38.151
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\System32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.exe
O23 - Service: AVG7 Alert Manager Server (Avg7Alrt) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVG7\avgamsvr.exe
O23 - Service: AVG7 Update Service (Avg7UpdSvc) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVG7\avgupsvc.exe
O23 - Service: Sandra Data Service (SandraDataSrv) - SiSoftware - C:\Program Files\SiSoftware\SiSoftware Sandra Lite 2005.SR1\RpcDataSrv.exe
O23 - Service: Sandra Service (SandraTheSrv) - SiSoftware - C:\Program Files\SiSoftware\SiSoftware Sandra Lite 2005.SR1\RpcSandraSrv.exe
O23 - Service: Serv-U FTP Server (Serv-U) - Unknown owner - C:\Program Files\Serv-U\ServUDaemon.exe
O23 - Service: StyleXPService - Unknown owner - C:\Program Files\TGTSoft\StyleXP\StyleXPService.exe
O23 - Service: TrueVector Internet Monitor (vsmon) - Zone Labs Inc. - C:\WINDOWS\system32\ZoneLabs\vsmon.exe
