[Virus] Impossiblr de lancer certains 'exe'

Il m'est impossible de lancer certaines applications ( comme poste de travail, par exemple). Qq'un peut m'aider à nettoyer mon PC?Merci d'avance.
Voici le log de HiJackThis :

Logfile of HijackThis v1.99.1
Scan saved at 22:31:07, on 11/09/2006
Platform: Windows XP (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 (6.00.2600.0000)

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\dXNlcg\command.exe
C:\Program Files\Network Monitor\netmon.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\rundll32.exe
C:\WINDOWS\System32\msijavaupdt32.exe
C:\WINDOWS\Explorer.exe
C:\WINDOWS\System32\winservnt32.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\WINDOWS\System32\igfxtray.exe
C:\WINDOWS\System32\hkcmd.exe
C:\WINDOWS\System32\RUNDLL32.EXE
C:\WINDOWS\thiselt.exe
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
C:\WINDOWS\system32\ntvdm.exe
C:\WINDOWS\HiJackThis\hijackthis\HijackThis.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,Local Page =
R3 - URLSearchHook: (no name) - {02EE5B04-F144-47BB-83FB-A60BD91B74A9} - C:\Program Files\SurfSideKick 3\SskBho.dll
F2 - REG:system.ini: Shell=Explorer.exe msijavaupdt32.exe
F2 - REG:system.ini: UserInit=C:\WINDOWS\System32\userinit.exe,msijavaupdt32.exe
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: (no name) - {79DF81E3-60C0-4043-A574-30DF1E322F9B} - C:\WINDOWS\System32\vtsts.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar2.dll
O3 - Toolbar: ToolBar888 - {CBCC61FA-0221-4ccc-B409-CEE865CACA3A} - C:\Program Files\ToolBar888\MyToolBar.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O4 - HKLM\..\Run: [Ms Java Update For Windows NT/XP] msijavaupdt32.exe
O4 - HKLM\..\Run: [Ms Update WinServices NT/XP] winservnt32.exe
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\System32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\System32\hkcmd.exe
O4 - HKLM\..\Run: [yyica84d] RUNDLL32.EXE w0032c51.dll,n 003ca84a0000000a0032c51
O4 - HKLM\..\Run: [PRONoMgrWired] c:\Program Files\Intel\PROSetWired\NCS\PROSet\PRONoMgr.exe
O4 - HKLM\..\Run: [pop06apelt] C:\WINDOWS\thiselt.exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [SurfSideKick 3] C:\Program Files\SurfSideKick 3\Ssk.exe
O4 - HKLM\..\RunServices: [Windows Kernel System Service] wkssvr.exe
O4 - HKCU\..\Run: [Ms Java Update For Windows NT/XP] msijavaupdt32.exe
O4 - HKCU\..\Run: [Ms Update WinServices NT/XP] winservnt32.exe
O4 - HKCU\..\Run: [SurfSideKick 3] C:\Program Files\SurfSideKick 3\Ssk.exe
O4 - HKCU\..\RunServices: [Windows Kernel System Service] wkssvr.exe
O8 - Extra context menu item: &Traduire à partir de l'anglais - res://c:\program files\google\GoogleToolbar2.dll/cmwordtrans.html
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~4\Office10\EXCEL.EXE/3000
O8 - Extra context menu item: Pages liées - res://c:\program files\google\GoogleToolbar2.dll/cmbacklinks.html
O8 - Extra context menu item: Pages similaires - res://c:\program files\google\GoogleToolbar2.dll/cmsimilar.html
O8 - Extra context menu item: Recherche &Google - res://c:\program files\google\GoogleToolbar2.dll/cmsearch.html
O8 - Extra context menu item: Version de la page actuelle disponible dans le cache Google - res://c:\program files\google\GoogleToolbar2.dll/cmcache.html
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~4\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Related - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O9 - Extra 'Tools' menuitem: Show &Related Links - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O9 - Extra button: (no name) - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - (no file)
O15 - Trusted Zone: *.elitemediagroup.net
O15 - Trusted Zone: *.media-motor.net
O15 - Trusted Zone: *.mmohsix.com
O15 - Trusted Zone: http://awbeta.net-nucleus.com (HKLM)
O20 - AppInit_DLLs: repairs303169590.dll,CLKERN.DLL
O20 - Winlogon Notify: igfxcui - C:\WINDOWS\SYSTEM32\igfxsrvc.dll
O20 - Winlogon Notify: Nls - C:\WINDOWS\system32\p6r40g9qe6.dll
O20 - Winlogon Notify: Syncmgr - C:\WINDOWS\system32\l40u0ed9eh0.dll (file missing)
O20 - Winlogon Notify: URL - C:\WINDOWS\system32\issecsvc.dll (file missing)
O20 - Winlogon Notify: vtsts - C:\WINDOWS\SYSTEM32\vtsts.dll
O23 - Service: Command Service (cmdService) - Unknown owner - C:\WINDOWS\dXNlcg\command.exe
O23 - Service: Intel NCS NetService (NetSvc) - Intel(R) Corporation - c:\Program Files\Intel\PROSetWired\NCS\Sync\NetSvc.exe
O23 - Service: Network Monitor - Unknown owner - C:\Program Files\Network Monitor\netmon.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\System32\HPZipm12.exe