Je suis certainement infecté par des virus

bonjour à tous je ne comprends pas depuis une semaine je ne peut pas redémarer l'ordi normalement, il faut effectuer un demarage "derniere bonne configuration" le mode sans echec ne fonctionne pas que dois je faire ?

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 09:45:09, on 24/08/2007
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)
Boot mode: Normal

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\System32\drivers\CDAC11BA.EXE
D:\Norton SystemWorks\Ghost\GhostStartService.exe
C:\WINDOWS\System32\nvsvc32.exe
D:\ProShowGold\ScsiAccess.exe
D:\NORTON~1\NORTON~1\SPEEDD~1\NOPDB.EXE
C:\WINDOWS\System32\PAStiSvc.exe
C:\WINDOWS\System32\svchost.exe
F:\Blue Coat K9 Web Protection\k9filter.exe
C:\WINDOWS\Explorer.EXE
F:\LogProtect\logprotect.exe
C:\DOCUME~1\Alban\LOCALS~1\Temp\svchost.exe
F:\LogProtect\lpwchdg.exe
C:\Documents and Settings\Alban\Bureau\Utilitaire\ramboost XP.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\MSN Messenger\msnmsgr.exe
C:\Program Files\MSN Messenger\usnsvc.exe
C:\Program Files\Trend Micro\HijackThis+\HijackThis.exe
F:\eMule b\emule.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\AxBx\VirusKeeper 2007 Pro Evaluation\vk_scan.exe
C:\Program Files\Internet Explorer\iexplore.exe
F:\CCleaner\ccleaner.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
O4 - HKLM\..\Run: [LogProtect] "F:\LogProtect\logprotect.exe"
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\System32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [WindowsServicesStartup] C:\DOCUME~1\Alban\LOCALS~1\Temp\svchost.exe 1
O4 - HKCU\..\Run: [RamBoostXp] C:\Documents and Settings\Alban\Bureau\Utilitaire\ramboost XP.exe
O10 - Unknown file in Winsock LSP: c:\windows\system32\nwprovau.dll
O23 - Service: AVG Anti-Spyware Guard - Unknown owner - F:\AVG Anti-Spyware 7.5\guard.exe (file missing)
O23 - Service: Boonty Games - BOONTY - C:\Program Files\Fichiers communs\BOONTY Shared\Service\Boonty.exe
O23 - Service: C-DillaCdaC11BA - Macrovision - C:\WINDOWS\System32\drivers\CDAC11BA.EXE
O23 - Service: GhostStartService - Symantec Corporation - D:\Norton SystemWorks\Ghost\GhostStartService.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: InCD Helper (InCDsrv) - Ahead Software AG - C:\Program Files\Ahead\InCD\InCDsrv.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe
O23 - Service: Remote Packet Capture Protocol v.0 (experimental) (rpcapd) - Unknown owner - C:\Program Files\WinPcap\rpcapd.exe (file missing)
O23 - Service: ScsiAccess - Unknown owner - D:\ProShowGold\ScsiAccess.exe
O23 - Service: Speed Disk service - Symantec Corporation - D:\NORTON~1\NORTON~1\SPEEDD~1\NOPDB.EXE
O23 - Service: STI Simulator - Unknown owner - C:\WINDOWS\System32\PAStiSvc.exe
O23 - Service: Blue Coat K9 Web Protection (WebFilter) - Unknown owner - F:\Blue Coat K9 Web Protection\k9filter.exe