Analyse hijackthis log

Mon ordinateur est très lent depuis 6 semaines et je sais pas d'où vient le problème.
Mon OS est Windows 2000 Pro
Merci d'avance de votre aide.

Voici mon fichier de log d'Hijackthis :

Logfile of HijackThis v1.99.1
Scan saved at 21:37:13, on 26/04/2007
Platform: Windows 2000 SP4 (WinNT 5.00.2195)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

Running processes:
C:\WINNT\System32\smss.exe
C:\WINNT\system32\winlogon.exe
C:\WINNT\system32\services.exe
C:\WINNT\system32\lsass.exe
C:\Program Files\Lavasoft\Ad-Aware Pro\aawservice.exe
C:\Program Files\Network Associates\VirusScan\Mcshield.exe
C:\Program Files\Network Associates\VirusScan\VsTskMgr.exe
C:\WINNT\system32\svchost.exe
C:\WINNT\system32\svchost.exe
C:\WINNT\System32\svchost.exe
C:\WINNT\System32\WBEM\WinMgmt.exe
C:\WINNT\Explorer.EXE
C:\Program Files\Network Associates\VirusScan\SHSTAT.EXE
C:\Program Files\Network Associates\Common Framework\UpdaterUI.exe
C:\Program Files\Fichiers communs\Network Associates\TalkBack\TBMon.exe
C:\WINNT\system32\dslagent.exe
C:\Program Files\PopUp Destroy\Popup-Destroy.exe
C:\Program Files\MSN Messenger\MsnMsgr.Exe
C:\Program Files\RamBoost XP\rambxpfr.exe
C:\Program Files\SpywareGuard\sgmain.exe
C:\Program Files\SpywareGuard\sgbhp.exe
C:\Program Files\Lavasoft\Ad-Aware Pro\AAW2007Pro.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Documents and Settings\Administrateur\Bureau\Désinsfection malwares\hijackthis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.google.fr/?gws_rd=ssl
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = 192.168.0.1:8080
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: SpywareGuard Download Protection - {4A368E80-174F-4872-96B5-0B27DDD11DB2} - C:\Program Files\SpywareGuard\dlprotect.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.5.0_11\bin\ssv.dll
O2 - BHO: IeCatch2 Class - {A5366673-E8CA-11D3-9CD9-0090271D075B} - C:\PROGRA~1\FlashGet\jccatch.dll
O3 - Toolbar: @msdxmLC.dll,-1@1033,&Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINNT\System32\msdxm.ocx
O4 - HKLM\..\Run: [Synchronization Manager] mobsync.exe /logon
O4 - HKLM\..\Run: [ShStatEXE] "C:\Program Files\Network Associates\VirusScan\SHSTAT.EXE" /STANDALONE
O4 - HKLM\..\Run: [McAfeeUpdaterUI] "C:\Program Files\Network Associates\Common Framework\UpdaterUI.exe" /StartedFromRunKey
O4 - HKLM\..\Run: [Network Associates Error Reporting Service] "C:\Program Files\Fichiers communs\Network Associates\TalkBack\TBMon.exe"
O4 - HKLM\..\Run: [DSLAGENTEXE] dslagent.exe USB
O4 - HKLM\..\Run: [PopUp Destroy] C:\Program Files\PopUp Destroy\Popup-Destroy.exe
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - Startup: SpywareGuard.lnk = C:\Program Files\SpywareGuard\sgmain.exe
O4 - Global Startup: RamBoost XP.lnk = C:\Program Files\RamBoost XP\rambxpfr.exe
O4 - Global Startup: SpywareGuard.lnk = C:\Program Files\SpywareGuard\sgmain.exe
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O8 - Extra context menu item: Tout télécharger en utilisant FlashGet - C:\Program Files\FlashGet\jc_all.htm
O8 - Extra context menu item: Télécharger en utilisant FlashGet - C:\Program Files\FlashGet\jc_link.htm
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_11\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_11\bin\ssv.dll
O9 - Extra button: Run WinHTTrack - {36ECAF82-3300-8F84-092E-AFF36D6C7040} - C:\Program Files\WinHTTrack\WinHTTrackIEBar.dll
O9 - Extra 'Tools' menuitem: Launch WinHTTrack - {36ECAF82-3300-8F84-092E-AFF36D6C7040} - C:\Program Files\WinHTTrack\WinHTTrackIEBar.dll
O9 - Extra button: FlashGet - {D6E814A0-E0C5-11d4-8D29-0050BA6940E3} - C:\PROGRA~1\FlashGet\JetCar.exe
O9 - Extra 'Tools' menuitem: &FlashGet - {D6E814A0-E0C5-11d4-8D29-0050BA6940E3} - C:\PROGRA~1\FlashGet\JetCar.exe
O14 - IERESET.INF: START_PAGE_URL=https://www.google.fr/?gws_rd=ssl
O16 - DPF: {1754A1BA-A1DF-4F10-B199-AA55AA1A120F} (InstallerBehaviorFactory Class) - https://www.msn.com/fr-fr/
O16 - DPF: {193C772A-87BE-4B19-A7BB-445B226FE9A1} (ewidoOnlineScan Control) - http://download.ewido.net/ewidoOnlineScan.cab
O16 - DPF: {C36112BF-2FA3-4694-8603-3B510EA3B465} (Lycos File Upload Component) - http://f001.mail.caramail.lycos.fr/app/upl...ileUploader.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{805F3232-19C3-414D-9F2A-A8A25BFCE1DA}: NameServer = 192.168.0.1
O23 - Service: Ad-Aware 2007 Service (aawservice) - Lavasoft AB - C:\Program Files\Lavasoft\Ad-Aware Pro\aawservice.exe
O23 - Service: Diskeeper - Executive Software International, Inc. - C:\Program Files\Executive Software\DiskeeperLite\DKService.exe
O23 - Service: Service d'administration du Gestionnaire de disque logique (dmadmin) - VERITAS Software Corp. - C:\WINNT\System32\dmadmin.exe
O23 - Service: Network Associates McShield (McShield) - Network Associates, Inc. - C:\Program Files\Network Associates\VirusScan\Mcshield.exe
O23 - Service: Network Associates Task Manager (McTaskManager) - Network Associates, Inc. - C:\Program Files\Network Associates\VirusScan\VsTskMgr.exe