Mon ordi est trop lourd

Bonjour Mon systeme est trop slow depuis quelques semaines. Je pense qu'il est infecté !!!!
J'aimerai bien si quelqu'un peut m'aider SVP

voici mon Hijackthis
==================

Logfile of Trend Micro HijackThis v2.0.0 (BETA)
Scan saved at 5:44:40 PM, on 5/12/2007
Platform: Windows XP SP1 (WinNT 5.01.2600)
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:\Program Files\Ahead\InCD\InCDsrv.exe
C:\WINDOWS\Explorer.EXE
C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe
C:\WINDOWS\VM_STI.EXE
C:\Program Files\iTunes\iTunesHelper.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe
C:\Program Files\Ahead\InCD\InCD.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Program Files\Adobe\Acrobat 5.0\Distillr\AcroTray.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgemc.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\iPod\bin\iPodService.exe
C:\WINDOWS\System32\wuauclt.exe
C:\Program Files\MSN Messenger\usnsvc.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\HiJackThis_v2.exe

O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 5.0\Acrobat\ActiveX\AcroIEHelper.ocx
O2 - BHO: (no name) - {0E343953-7AB4-40BC-B804-BF13756EBC87} - C:\WINDOWS\System32\pmnlj.dll
O2 - BHO: (no name) - {3F9D0C61-737D-44D1-BD80-91AF857061CC} - C:\WINDOWS\system32\gebyyvv.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\Program Files\Spybot - Search & Destroy\SDHelper.dll
O2 - BHO: (no name) - {80FA3B84-E2AE-4083-AA62-99D2E83C0F1e} - C:\WINDOWS\System32\uwttaejf.dll (file missing)
O2 - BHO: (no name) - {E2EE5C44-C66D-499d-BEAE-A2A79189A63A} - C:\WINDOWS\System32\vvpuxskb.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O4 - HKLM\..\Run: [MsmqIntCert] regsvr32 /s mqrt.dll
O4 - HKLM\..\Run: [AVG7_CC] C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe /STARTUP
O4 - HKLM\..\Run: [BigDogPath] C:\WINDOWS\VM_STI.EXE USB(VGA) Camera
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] C:\Program Files\iTunes\iTunesHelper.exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [!AVG Anti-Spyware] "C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe" /minimized
O4 - HKLM\..\Run: [ZoneAlarm Client] "C:\Program Files\Zone Labs\ZoneAlarm\zlclient.exe"
O4 - HKLM\..\Run: [InCD] C:\Program Files\Ahead\InCD\InCD.exe
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [WindowsUpdate] rundll32.exe "C:\WINDOWS\System32\isablium.dll",realset
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [Yahoo! Pager] "C:\Program Files\Yahoo!\Messenger\YahooMessenger.exe" -quiet
O4 - HKCU\..\Run: [BgMonitor_{79662E04-7C6C-4d9f-84C7-88D8A56B10AA}] "C:\Program Files\Common Files\Ahead\Lib\NMBgMonitor.exe"
O4 - HKUS\S-1-5-19\..\Run: [AVG7_Run] C:\PROGRA~1\Grisoft\AVGFRE~1\avgw.exe /RUNONCE (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-20\..\Run: [AVG7_Run] C:\PROGRA~1\Grisoft\AVGFRE~1\avgw.exe /RUNONCE (User 'NETWORK SERVICE')
O4 - HKUS\S-1-5-18\..\Run: [AVG7_Run] C:\PROGRA~1\Grisoft\AVGFRE~1\avgw.exe /RUNONCE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [AVG7_Run] C:\PROGRA~1\Grisoft\AVGFRE~1\avgw.exe /RUNONCE (User 'Default user')
O4 - Startup: Adobe Gamma.lnk = C:\Program Files\Common Files\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: Acrobat Assistant.lnk = C:\Program Files\Adobe\Acrobat 5.0\Distillr\AcroTray.exe
O4 - Global Startup: ImageMixer for HDD Camcorder.lnk = ?
O4 - Global Startup: Suitcase Startup.lnk = ?
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O12 - Plugin for .spop: C:\Program Files\Internet Explorer\Plugins\NPDocBox.dll
O15 - Trusted Zone: *.sxload.net (HKLM)
O17 - HKLM\System\CCS\Services\Tcpip\..\{AC17DA8F-514C-45D8-80C7-739C5EF068A2}: NameServer = 206.123.6.11 206.123.6.10
O20 - Winlogon Notify: gebyyvv - C:\WINDOWS\SYSTEM32\gebyyvv.dll
O20 - Winlogon Notify: pmnlj - C:\WINDOWS\System32\pmnlj.dll
O20 - Winlogon Notify: __c00175C1 - C:\WINDOWS\System32\__c00175C1.dat
O20 - Winlogon Notify: __c005551 - C:\WINDOWS\System32\__c005551.dat
O20 - Winlogon Notify: __c00731A4 - C:\WINDOWS\System32\__c00731A4.dat
O20 - Winlogon Notify: __c00B6661 - C:\WINDOWS\System32\__c00B6661.dat
O22 - SharedTaskScheduler: Browseui preloader - {438755C2-A8BA-11D1-B96B-00A0C90312E1} - C:\WINDOWS\System32\browseui.dll
O22 - SharedTaskScheduler: Component Categories cache daemon - {8C7461EF-2B13-11d2-BE35-3078302C2030} - C:\WINDOWS\System32\browseui.dll
O23 - Service: Adobe LM Service - Adobe Systems - C:\Program Files\Common Files\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: AVG Anti-Spyware Guard - Anti-Malware Development a.s. - C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
O23 - Service: AVG7 Alert Manager Server (Avg7Alrt) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exe
O23 - Service: AVG7 Update Service (Avg7UpdSvc) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exe
O23 - Service: AVG E-mail Scanner (AVGEMS) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgemc.exe
O23 - Service: InCD Helper (InCDsrv) - Nero AG - C:\Program Files\Ahead\InCD\InCDsrv.exe
O23 - Service: iPod Service (iPodService) - Apple Computer, Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: TrueVector Internet Monitor (vsmon) - Zone Labs, LLC - C:\WINDOWS\system32\ZoneLabs\vsmon.exe