PC devenu très lent apres changement HD

Bonjour,
j'ai besoin d'un peu d'aide.
VOilà mon problème : Mon PC déconnait fortement, j'ai donc changé le disque dur principal et réinstallé XP. Depuis cette réinstallation, mon pc est très lent, les fenetres plantent régulierement...
Voici le rapport HijackThis :

Logfile of HijackThis v1.99.1
Scan saved at 17:30:18, on 19/01/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.5730.0011)

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\panda software\panda antivirus + firewall 2007\firewall\PNMSRV.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\ATKKBService.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\Program Files\Panda Software\Panda Antivirus + Firewall 2007\PavFnSvr.exe
C:\Program Files\Fichiers communs\Panda Software\PavShld\pavprsrv.exe
C:\Program Files\Panda Software\Panda Antivirus + Firewall 2007\pavsrv51.exe
C:\Program Files\Panda Software\Panda Antivirus + Firewall 2007\AVENGINE.EXE
C:\Program Files\Panda Software\Panda Antivirus + Firewall 2007\PsImSvc.exe
C:\Program Files\Alcohol Soft\Alcohol 120\StarWind\StarWindService.exe
C:\Program Files\Panda Software\Panda Antivirus + Firewall 2007\TPSrv.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Panda Software\Panda Antivirus + Firewall 2007\APVXDWIN.EXE
C:\WINDOWS\system32\RUNDLL32.EXE
C:\WINDOWS\system32\WTLXPan.Exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Copernic Desktop Search 2\DesktopSearchService.exe
c:\program files\panda software\panda antivirus + firewall 2007\WebProxy.exe
C:\Program Files\Adobe\Adobe Acrobat 6.0\Distillr\acrotray.exe
C:\Program Files\Logitech\SetPoint\SetPoint.exe
C:\Program Files\Fichiers communs\Logitech\khalshared\KHALMNPR.EXE
C:\Program Files\Internet Explorer\iexplore.exe
C:\Documents and Settings\BenRom\Bureau\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.google.fr/?gws_rd=ssl
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr/?ocid=iehp
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.msn.com/fr-fr/?ocid=iehp
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Adobe Acrobat 6.0\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\Program Files\Spybot - Search & Destroy\SDHelper.dll
O2 - BHO: AcroIEToolbarHelper Class - {AE7CD045-E861-484f-8273-0445EE161910} - C:\Program Files\Adobe\Adobe Acrobat 6.0\Acrobat\AcroIEFavClient.dll
O3 - Toolbar: Adobe PDF - {47833539-D0C5-4125-9FA8-0819E2EAAC93} - C:\Program Files\Adobe\Adobe Acrobat 6.0\Acrobat\AcroIEFavClient.dll
O3 - Toolbar: Copernic Desktop Search 2 - {968631B6-4729-440D-9BF4-251F5593EC9A} - C:\Program Files\Copernic Desktop Search 2\DesktopSearchBand2526.dll
O4 - HKLM\..\Run: [APVXDWIN] "C:\Program Files\Panda Software\Panda Antivirus + Firewall 2007\APVXDWIN.EXE" /s
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [WTLXPan] WTLXPan.Exe
O4 - HKLM\..\Run: [Logitech Hardware Abstraction Layer] KHALMNPR.EXE
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Copernic Desktop Search 2] "C:\Program Files\Copernic Desktop Search 2\DesktopSearchService.exe" /tray
O4 - Global Startup: Adobe Gamma Loader.lnk = C:\Program Files\Fichiers communs\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: Assistant d'Acrobat.lnk = C:\Program Files\Adobe\Adobe Acrobat 6.0\Distillr\acrotray.exe
O4 - Global Startup: Logitech SetPoint.lnk = ?
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - %windir%\Network Diagnostic\xpnetdiag.exe (file missing)
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - %windir%\Network Diagnostic\xpnetdiag.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
O11 - Options group: [INTERNATIONAL] International*
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/...
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O20 - Winlogon Notify: avldr - C:\WINDOWS\SYSTEM32\avldr.dll
O21 - SSODL: WPDShServiceObj - {AAA288BA-9A4C-45B0-95D7-94D524869DB5} - C:\WINDOWS\system32\WPDShServiceObj.dll
O23 - Service: Adobe LM Service - Unknown owner - C:\Program Files\Fichiers communs\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: ATK Keyboard Service (ATKKeyboardService) - ASUSTeK COMPUTER INC. - C:\WINDOWS\ATKKBService.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Panda Function Service (PAVFNSVR) - Panda Software International - C:\Program Files\Panda Software\Panda Antivirus + Firewall 2007\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 Antivirus + Firewall 2007\pavsrv51.exe
O23 - Service: Panda Network Manager (PNMSRV) - Panda Software International - c:\program files\panda software\panda antivirus + firewall 2007\firewall\PNMSRV.EXE
O23 - Service: Panda IManager Service (PSIMSVC) - Panda Software - C:\Program Files\Panda Software\Panda Antivirus + Firewall 2007\PsImSvc.exe
O23 - Service: StarWind iSCSI Service (StarWindService) - Rocket Division Software - C:\Program Files\Alcohol Soft\Alcohol 120\StarWind\StarWindService.exe
O23 - Service: Panda TPSrv (TPSrv) - Panda Software - C:\Program Files\Panda Software\Panda Antivirus + Firewall 2007\TPSrv.exe

Merci d'avance pour votre aide!!
BenRom