OUPs, ça doit être la fatigue: j'ai pas mis le début du log; je recommence donc:

Logfile of HijackThis v1.99.1
Scan saved at 09:46:54, on 09/10/2005
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\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Internet Explorer\iexplore.exe
C:\WINDOWS\System32\wuapi.exe
C:\WINDOWS\etb\pokapoka75.exe
C:\WINDOWS\csrs.exe
C:\WINDOWS\taskcntr.exe
C:\WINDOWS\system32\cmd.exe
C:\Program Files\ISTsvc\istsvc.exe
C:\WINDOWS\ulcrs.exe
C:\Program Files\Internet Optimizer\optimize.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7Debug\mdm.exe
C:\WINDOWS\System32\a7abgd\zlip.exe
C:\WINDOWS\regedit.exe
C:\WINDOWS\regedit.exe
c:\aaaa.exe
c:\aaaa.exe
C:\Temp\Répertoire temporaire 2 pour hijackthis.zip\HijackThis.exe
C:\WINDOWS\WinVid32.exe

R1 - HKCU\Software\Microsoft\Internet Explorer,SearchURL = http://www.searchtheworld4you.com/sp2.php
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://www.searchtheworld4you.com/sp2.php
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://www.searchtheworld4you.com/sp2.php
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.yahoo.fr/
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = NUMERICABLE
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - Default URLSearchHook is missing
O2 - BHO: BHObj Class - {00000010-6F7D-442C-93E3-4A4827C2E4C8} - C:\WINDOWS\nem220.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O4 - HKLM\..\Run: [Spooler SubSystem App] C:\WINDOWS\System32\spooIsv.exe
O4 - HKLM\..\Run: [Media service] notpad.exe
O4 - HKLM\..\Run: [microsft Updates] msupdate32.exe
O4 - HKLM\..\Run: [Application Layer Gateway Service] C:\WINDOWS\System32\algs.exe
O4 - HKLM\..\Run: [2Search] C:\Program Files\2search\main.exe
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [MCX Update] op1.exe
O4 - HKLM\..\Run: [SurfAccuracy] C:\Program Files\SurfAccuracy\SAcc.exe
O4 - HKLM\..\Run: [UserFaultCheck] %systemroot%\system32\dumprep 0 -u
O4 - HKLM\..\Run: [IST Service] C:\Program Files\ISTsvc\istsvc.exe
O4 - HKLM\..\Run: [dSyrmh] C:\WINDOWS\ulcrs.exe
O4 - HKLM\..\Run: [Internet Optimizer] "C:\Program Files\Internet Optimizer\optimize.exe"
O4 - HKLM\..\Run: [Power Scan] "C:\Program Files\Power Scan\powerscan.exe" /aid:152596
O4 - HKLM\..\Run: [System service75] C:\WINDOWS\etb\pokapoka75.exe
O4 - HKLM\..\RunServices: [Media service] notpad.exe
O4 - HKLM\..\RunServices: [microsft Updates] msupdate32.exe
O4 - HKLM\..\RunServices: [MCX Update] op1.exe
O4 - HKCU\..\Run: [Mini-XP] C:\Program Files\Minimizer XP\Mini-XP.exe
O4 - HKCU\..\Run: [SuperRam] "C:\Program Files\SuperRam\SuperRam.exe"
O4 - HKCU\..\Run: [Registry Cleaner] "C:\Program Files\TPT Registry_Cleaner (Trial)\RegClean.exe"
O4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office10\OSA.EXE
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O9 - Extra button: SideFind - {10E42047-DEB9-4535-A118-B3F6EC39B807} - C:\Program Files\SideFind\sidefind.dll
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: {20048BB3-DB68-11CF-9CAF-00AA006CB425} (007installer Control) - http://www.bardownload.com/prompt/cabs/website.cab
O16 - DPF: {205FF73B-CA67-11D5-99DD-444553540013} - http://adserver.sharewareonline.com/adserver/Install.cab
O16 - DPF: {7C559105-9ECF-42B8-B3F7-832E75EDD959} (Installer Class) - http://www.tbcode.com/ist/softwares/v4.0/0006_regular.cab
O16 - DPF: {8FCDF9D9-A28B-480F-8C3D-581F119A8AB8} - http://static.zangocash.com/cab/Zango/ie/bridge-c18.cab
O23 - Service: Automatic Update Service (Automatic Update) - Unknown owner - C:\WINDOWS\System32\wuapi.exe
O23 - Service: sdktemp - Unknown owner - C:\WINDOWS\microsoft.exe
O23 - Service: TASKESV (TESV) - Unknown owner - C:\WINDOWS\taskcntr.exe
O23 - Service: Windows 32 Bit (Windows 32 Bit Drivers) - Unknown owner - C:\WINDOWS\WinVid32.exe
O23 - Service: Windows Time Sync (wservtime) - Unknown owner - C:\WINDOWS\csrs.exe