Plus rient ne s'afice du mon bureau

Bonjour,
je vous fais part du raporte du fichier log.txt et celui de info.txt
Logfile of random's system information tool 1.06 (written by random/random)
Run by KOITA at 2009-07-04 17:23:51
WIN_XP Service Pack 2
System drive C: has 470 MB (2%) free of 19 GB
Total RAM: 254 MB (20% free)

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 17:25:23, on 04/07/2009
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
Boot mode: Normal

Running processes:
C:\WINDOWS1\System32\smss.exe
C:\WINDOWS1\system32\winlogon.exe
C:\WINDOWS1\system32\services.exe
C:\WINDOWS1\system32\lsass.exe
C:\WINDOWS1\system32\svchost.exe
C:\WINDOWS1\System32\svchost.exe
C:\WINDOWS1\system32\spoolsv.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\WINDOWS1\Explorer.EXE
C:\WINDOWS1\system32\hkcmd.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe
C:\WINDOWS1\system32\ctfmon.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Documents and Settings\KOITA.JEROME\Menu Démarrer\Programmes\Démarrage\Dos Optimizer.pif
C:\Program Files\Yahoo!\Messenger\ymsgr_tray.exe
C:\Program Files\Luxor\luxor.exe
C:\Documents and Settings\KOITA.JEROME\Mes documents\RSIT.exe
C:\Program Files\trend micro\KOITA.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://www.google.fr/toolbar/ie8/sidebar.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = https://www.google.fr/?gws_rd=ssl
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = www.yahoo.fr
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = http://www.google.fr/toolbar/ie8/sidebar.html
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = http://www.google.fr/keyword/%s
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = http://lstard.stormcorp.net/
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O4 - HKLM\..\Run: [Cmaudio] RunDll32 cmicnfg.cpl,CMICtrlWnd
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS1\system32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS1\system32\hkcmd.exe
O4 - HKLM\..\Run: [MSConfig] C:\WINDOWS1\PCHealth\HelpCtr\Binaries\MSConfig.exe /auto
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe" /min
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS1\system32\ctfmon.exe
O4 - HKCU\..\Run: [cdoosoft] C:\WINDOWS1\system32\olhrwef.exe
O4 - HKCU\..\Run: [Yahoo! Pager] "C:\Program Files\Yahoo!\Messenger\YahooMessenger.exe" -quiet
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS1\system32\CTFMON.EXE (User '?')
O4 - HKUS\S-1-5-19\..\RunOnce: [LSD_III] %systemroot%\LSD\end.cmd (User '?')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS1\system32\CTFMON.EXE (User '?')
O4 - HKUS\S-1-5-20\..\RunOnce: [LSD_III] %systemroot%\LSD\end.cmd (User '?')
O4 - HKUS\S-1-5-21-1844237615-1580818891-682003330-1003\..\Run: [CTFMON.EXE] C:\WINDOWS1\system32\ctfmon.exe (User '?')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS1\system32\CTFMON.EXE (User '?')
O4 - HKUS\S-1-5-18\..\RunOnce: [LSD_III] %systemroot%\LSD\end.cmd (User '?')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS1\system32\CTFMON.EXE (User 'Default user')
O4 - HKUS\.DEFAULT\..\RunOnce: [LSD_III] %systemroot%\LSD\end.cmd (User 'Default user')
O4 - S-1-5-21-1844237615-1580818891-682003330-1003 Startup: Dos Optimizer.pif = ? (User '?')
O4 - Startup: Dos Optimizer.pif = ?
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\Microsoft Office\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\Microsoft Office\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Yahoo! Messenger - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - C:\Program Files\Yahoo!\Messenger\YahooMessenger.exe
O9 - Extra 'Tools' menuitem: Yahoo! Messenger - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - C:\Program Files\Yahoo!\Messenger\YahooMessenger.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
O23 - Service: Planificateur Avira AntiVir Personal - Free Antivirus (AntiVirScheduler) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe
O23 - Service: Avira AntiVir Personal - Free Antivirus Guard (AntiVirService) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe