Ralentissement de mon PC

Bonjour,
Depuis quelques jours, mon PC est victime de ralentissements intempestifs, notamment lorsque je navigue sur internet, (je suis obligé de fermer firefox par les "taches" et redémarrer mon travail ensuite...

Logfile of random's system information tool 1.06 (written by random/random)
Run by Alex at 2010-02-13 11:55:23
Microsoft Windows XP Édition familiale Service Pack 3
System drive C: has 41 GB (54%) free of 76 GB
Total RAM: 3070 MB (66% free)

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 11:55:32, on 13/02/2010
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v8.00 (8.00.6001.18702)
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\nvsvc32.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\AVG\AVG9\avgchsvx.exe
C:\Program Files\AVG\AVG9\avgrsx.exe
C:\Program Files\AVG\AVG9\avgcsrvx.exe
C:\Program Files\Lavasoft\Ad-Aware\AAWService.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
C:\Program Files\AVG\AVG9\avgwdsvc.exe
C:\Program Files\Bonjour\mDNSResponder.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Java\jre6\bin\jqs.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\AVG\AVG9\avgnsx.exe
C:\Program Files\NVIDIA Corporation\nTune\nTuneService.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\PROGRA~1\AVG\AVG9\avgtray.exe
C:\WINDOWS\system32\RUNDLL32.EXE
C:\Program Files\Analog Devices\Core\smax4pnp.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Microsoft ActiveSync\WCESCOMM.EXE
C:\Program Files\Logitech\SetPoint\SetPoint.exe
C:\Program Files\Fichiers communs\Logishrd\KHAL2\KHALMNPR.EXE
C:\Program Files\Fichiers communs\LogiShrd\LComMgr\Communications_Helper.exe
C:\Program Files\Fichiers communs\LogiShrd\LComMgr\LVComSX.exe
C:\Program Files\Windows Live\Messenger\msnmsgr.exe
C:\Program Files\Windows Live\Contacts\wlcomm.exe
C:\Program Files\iTunes\iTunes.exe
C:\Program Files\iPod\bin\iPodService.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Documents and Settings\Alex\Bureau\RSIT.exe
C:\Program Files\trend micro\Alex.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr/?ocid=iehp
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
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: (no name) - EF99BD32-C1FB-11D2-892F-0090271D4F88} - (no file)
O2 - BHO: (no name) - {02478D38-C3F9-4efb-9B51-7695ECA05670} - (no file)
O2 - BHO: HP Print Enhancer - {0347C33E-8762-4905-BF09-768834316C61} - C:\Program Files\Hewlett-Packard\Smart Web Printing\hpswp_printenhancer.dll
O2 - BHO: HP Print Clips - {053F9267-DC04-4294-A72C-58F732D338C0} - C:\Program Files\Hewlett-Packard\Smart Web Printing\hpswp_framework.dll
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: WormRadar.com IESiteBlocker.NavFilter - {3CA2F312-6F6E-4B53-A66E-4E65E497C8C0} - C:\Program Files\AVG\AVG9\avgssie.dll
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: Programme d'aide de l'Assistant de connexion Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: FDMIECookiesBHO Class - {CC59E0F9-7E43-44FA-9FAA-8377850BF205} - C:\Program Files\Free Download Manager\iefdm2.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Program Files\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O3 - Toolbar: (no name) - {CCC7A320-B3CA-4199-B1A6-9F516DD69829} - (no file)
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\system32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\system32\hkcmd.exe
O4 - HKLM\..\Run: [HPDJ Taskbar Utility] C:\WINDOWS\system32\spool\drivers\w32x86\3\hpztsb08.exe
O4 - HKLM\..\Run: [AVG9_TRAY] C:\PROGRA~1\AVG\AVG9\avgtray.exe
O4 - HKLM\..\Run: [nwiz] nwiz.exe /installquiet
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [SoundMAXPnP] C:\Program Files\Analog Devices\Core\smax4pnp.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [NVIDIA nTune] "C:\Program Files\NVIDIA Corporation\nTune\nTuneCmd.exe" clear
O4 - HKCU\..\Run: [H/PC Connection Agent] "C:\Program Files\Microsoft ActiveSync\WCESCOMM.EXE"
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE RÉSEAU')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - Global Startup: Logitech SetPoint.lnk = C:\Program Files\Logitech\SetPoint\SetPoint.exe
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~4\Office12\EXCEL.EXE/3000
O8 - Extra context menu item: Image Converter 2 ??? - C:\Program Files\Sony\Image Converter 2\menu.htm
O8 - Extra context menu item: Tout télécharger avec Free Download Manager - file://C:\Program Files\Free Download Manager\dlall.htm
O8 - Extra context menu item: Transfert par Image Converter 3 - C:\PROGRAM FILES\SONY\IMAGE CONVERTER 3\menu.htm
O8 - Extra context menu item: Télécharger avec Free Download Manager - file://C:\Program Files\Free Download Manager\dllink.htm
O8 - Extra context menu item: Télécharger la sélection avec Free Download Manager - file://C:\Program Files\Free Download Manager\dlselected.htm
O8 - Extra context menu item: Télécharger la vidéo avec Free Download Manager - file://C:\Program Files\Free Download Manager\dlfvideo.htm
O9 - Extra button: Créer un Favori de l'appareil mobile - {2EAF5BB1-070F-11D3-9307-00C04FAE2D4F} - C:\Program Files\Microsoft ActiveSync\inetrepl.dll
O9 - Extra button: (no name) - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - C:\Program Files\Microsoft ActiveSync\inetrepl.dll
O9 - Extra 'Tools' menuitem: Créer un Favori de l'appareil mobile... - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - C:\Program Files\Microsoft ActiveSync\inetrepl.dll
O9 - Extra button: Livre de reliures HP - {58ECB495-38F0-49cb-A538-10282ABF65E7} - C:\Program Files\Hewlett-Packard\Smart Web Printing\hpswp_extensions.dll
O9 - Extra button: Sélection intelligente HP - {700259D7-1666-479a-93B1-3250410481E8} - C:\Program Files\Hewlett-Packard\Smart Web Printing\hpswp_extensions.dll
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~4\OFFICE11\REFIEBAR.DLL
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
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: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://download.microsoft.com/download/E/5/6/E5611B10-0D6D-4117-8430-A67417AA88CD/LegitCheckControl.cab
O16 - DPF: {4ED9DDF0-7479-4BBE-9335-5A1EDB1D8A21} - http://download.mcafee.com/molbin/shared/mcinsctl/fr/4,0,0,83/mcinsctl.cab
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://gfx1.hotmail.com/mail/w3/resources/MSNPUpld.cab
O16 - DPF: {5ED80217-570B-4DA9-BF44-BE107C0EC166} (Windows Live Safety Center Base Module) - http://cdn.scan.onecare.live.com/resource/download/scanner/wlscbase5483.cab
O16 - DPF: {952F9A71-131A-11D5-8404-00500445A7D0} (ActiveMiniplug Class) - https://starnet.star-airlines.fr/AppStar/mplugax.cab
O16 - DPF: {BCC0FF27-31D9-4614-A68E-C18E1ADA4389} - http://download.mcafee.com/molbin/shared/mcgdmgr/fr/1,0,0,20/mcgdmgr.cab
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O18 - Protocol: linkscanner - {F274614C-63F8-47D5-A4D1-FBDDE494F8D1} - C:\Program Files\AVG\AVG9\avgpp.dll
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\FICHIE~1\Skype\SKYPE4~1.DLL
O20 - Winlogon Notify: avgrsstarter - C:\WINDOWS\SYSTEM32\avgrsstx.dll
O23 - Service: Adobe LM Service - Adobe Systems - C:\Program Files\Fichiers communs\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: AVG Free WatchDog (avg9wd) - AVG Technologies CZ, s.r.o. - C:\Program Files\AVG\AVG9\avgwdsvc.exe
O23 - Service: Service Bonjour (Bonjour Service) - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: Image Converter SCSI Service (ICScsiSV) - Sony Corporation - C:\Program Files\Sony\IMAGE CONVERTER 3\ICScsiSV.exe
O23 - Service: IcVzMonLauncher - Sony Corporation - C:\Program Files\Sony\IMAGE CONVERTER 3\IcVzMonLauncher.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Fichiers communs\InstallShield\Driver\1150\Intel 32\IDriverT.exe
O23 - Service: Image Converter video recording monitor for VAIO Entertainment - Sony Corporation - C:\Program Files\Sony\IMAGE CONVERTER 3\IcVzMon.exe
O23 - Service: Service de l’iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Program Files\Java\jre6\bin\jqs.exe
O23 - Service: Lavasoft Ad-Aware Service - Lavasoft - C:\Program Files\Lavasoft\Ad-Aware\AAWService.exe
O23 - Service: Logitech Bluetooth Service (LBTServ) - Logitech, Inc. - C:\Program Files\Fichiers communs\Logitech\Bluetooth\LBTServ.exe
O23 - Service: MSCSPTISRV - Sony Corporation - C:\Program Files\Fichiers communs\Sony Shared\AVLib\MSCSPTISRV.exe
O23 - Service: nTune Service (nTuneService) - NVIDIA - C:\Program Files\NVIDIA Corporation\nTune\nTuneService.exe
O23 - Service: NVIDIA Display Driver Service (nvsvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: PACSPTISVR - Unknown owner - C:\Program Files\Fichiers communs\Sony Shared\AVLib\PACSPTISVR.exe
O23 - Service: SonicStage Back-End Service - Sony Corporation - C:\Program Files\Fichiers communs\Sony Shared\AVLib\SsBeSvc.exe
O23 - Service: Sony SPTI Service (SPTISRV) - Sony Corporation - C:\Program Files\Fichiers communs\Sony Shared\AVLib\SPTISRV.exe
O23 - Service: SonicStage SCSI Service (SSScsiSV) - Sony Corporation - C:\Program Files\Fichiers communs\Sony Shared\AVLib\SSScsiSV.exe