Lenteur du pc et plantage application

Salut, voilà j'espère que vous pourrrez m'aider car je ne sais plus quoi faire.. Mon pc se plante tout le temps!! Je le démrarre (déjà super lent), je me connecte, et ensuite tout se ralenti, alors que je ne devrais pas avoir ces problèmes par rapport à ma configuration :
Pentium 4 CPU 3ghz
1 Go RAM
XP edition familiale pack2
merci d'avance
j'ai fait un scan, voilà mon rapport:
Logfile of HijackThis v1.99.1
Scan saved at 09:56:48, on 05/12/2006
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
c:\program files\panda software\panda platinum 2005 internet security\firewall\PNMSRV.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\WIDCOMM\Bluetooth Software\bin\btwdins.exe
C:\Program Files\Panda Software\Panda Platinum 2005 Internet Security\PavFnSvr.exe
C:\Program Files\Fichiers communs\Panda Software\PavShld\pavprsrv.exe
C:\Program Files\Panda Software\Panda Platinum 2005 Internet Security\pavsrv51.exe
C:\Program Files\Panda Software\Panda Platinum 2005 Internet Security\AntiSpam\pskmssvc.exe
C:\Program Files\Panda Software\Panda Platinum 2005 Internet Security\psimsvc.exe
C:\Program Files\Panda Software\Panda Platinum 2005 Internet Security\AVENGINE.EXE
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Panda Software\Panda Platinum 2005 Internet Security\TPSrv.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\Program Files\Panda Software\Panda Platinum 2005 Internet Security\apvxdwin.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\RunDll32.exe
C:\Program Files\Panda Software\Panda Platinum 2005 Internet Security\SRVLOAD.EXE
C:\WINDOWS\system32\rundll32.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Microsoft ActiveSync\wcescomm.exe
C:\PROGRA~1\MICROS~3\rapimgr.exe
c:\program files\panda software\panda platinum 2005 internet security\WebProxy.exe
C:\Program Files\Multimedia Combo Set\PS2USBKbdDrv.exe
C:\PROGRA~1\MOZILL~1\FIREFOX.EXE
C:\Program Files\Panda Software\Panda Platinum 2005 Internet Security\psimreal.exe
C:\Program Files\WinRAR\WinRAR.exe
C:\DOCUME~1\Nathalie\LOCALS~1\Temp\Rar$EX00.937\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.free.fr/freebox/index.html
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O4 - HKLM\..\Run: [Raccourci vers la page des propriétés de High Definition Audio] HDAudPropShortcut.exe
O4 - HKLM\..\Run: [Cmaudio] RunDll32 cmicnfg.cpl,CMICtrlWnd
O4 - HKLM\..\Run: [SCANINICIO] "C:\Program Files\Panda Software\Panda Platinum 2005 Internet Security\Inicio.exe"
O4 - HKLM\..\Run: [APVXDWIN] "C:\Program Files\Panda Software\Panda Platinum 2005 Internet Security\APVXDWIN.EXE" /s
O4 - HKLM\..\Run: [BluetoothAuthenticationAgent] rundll32.exe bthprops.cpl,,BluetoothAuthenticationAgent
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [H/PC Connection Agent] "C:\Program Files\Microsoft ActiveSync\wcescomm.exe"
O9 - Extra button: (no name) - {85d1f590-48f4-11d9-9669-0800200c9a66} - %windir%\bdoscandel.exe (file missing)
O9 - Extra 'Tools' menuitem: Uninstall BitDefender Online Scanner v8 - {85d1f590-48f4-11d9-9669-0800200c9a66} - %windir%\bdoscandel.exe (file missing)
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
O16 - DPF: {1F83CD9E-505E-4F87-BECE-0832A763E36F} (Image Uploader 3.0 Control) - http://www.mypixmania.com/importer/MypixUploader.cab
O16 - DPF: {5D86DDB5-BDF9-441B-9E9E-D4730F4EE499} (BDSCANONLINE Control) - http://www.bitdefender.fr/scan8/oscan8.cab
O16 - DPF: {C45B1500-7B63-47C2-AB25-C28CB46AFDEE} (Media Bar) - http://sib1.od2.com/common/musicmanager/installation/MusicManagerPlugin.CAB
O20 - AppInit_DLLs: C:\PROGRA~1\Google\GOOGLE~1\GOEC62~1.DLL
O20 - Winlogon Notify: avldr - C:\WINDOWS\SYSTEM32\avldr.dll
O20 - Winlogon Notify: WgaLogon - C:\WINDOWS\SYSTEM32\WgaLogon.dll
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.exe
O23 - Service: Bluetooth Service (btwdins) - WIDCOMM, Inc. - C:\Program Files\WIDCOMM\Bluetooth Software\bin\btwdins.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Fichiers communs\InstallShield\Driver\1050\Intel 32\IDriverT.exe
O23 - Service: Panda Function Service (PAVFNSVR) - Panda Software International - C:\Program Files\Panda Software\Panda Platinum 2005 Internet Security\PavFnSvr.exe
O23 - Service: Panda Process Protection Service (PavPrSrv) - Panda Software - C:\Program Files\Fichiers communs\Panda Software\PavShld\pavprsrv.exe
O23 - Service: Panda anti-virus service (PAVSRV) - Panda Software International - C:\Program Files\Panda Software\Panda Platinum 2005 Internet Security\pavsrv51.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: Panda Antispam Engine (pmshellsrv) - Panda Software International - C:\Program Files\Panda Software\Panda Platinum 2005 Internet Security\AntiSpam\pskmssvc.exe
O23 - Service: Panda Network Manager (PNMSRV) - Panda Software International - c:\program files\panda software\panda platinum 2005 internet security\firewall\PNMSRV.EXE
O23 - Service: Panda IManager Service (PSIMSVC) - Panda Software - C:\Program Files\Panda Software\Panda Platinum 2005 Internet Security\psimsvc.exe
O23 - Service: Panda TPSrv (TPSrv) - Panda Software - C:\Program Files\Panda Software\Panda Platinum 2005 Internet Security\TPSrv.exe