Freeze du système toutes les secondes environ

Bonjour,

Depuis 2 jours, mon ordinateur (un PC portable Dell Vostro 1700 de 6 ans, Inter Core 2 Duo T7500 @2.2Ghz, 2Go de RAM, 2 HDD de 120Go chacun, tournant sous Vista 32bits) connaît un gros problème de freeze (tout le système se ralentit à intervalle régulier d'environ 1 sec, et ce dès le démarrage).

J'avais initialement pensé à un problème de ma carte son puisque j'avais repéré ce problème lors des différents sons systèmes qui saccadaient et des vidéos sur Internet qui faisaient de même, mais l'image est également saccadée au même moment.

De plus, sans qu'aucun programme ne soit lancé, la souris se fige également lorsque je la fais bouger sur le bureau, toujours à cette même fréquence d'une seconde environ.Vu que je travaille sur mon mémoire de fin d'étude en ce moment, c'est assez pénible à la longue de voir le PC ramer dès que j'essaie de lancer le moindre programme Excel/VBA... :/

J'ai essayé de trouver des solutions sur Internet par moi même, mais j'avoue ne pas avoir trouvé le problème: mes composants sont relativement chauds, (environ 50° chacun) mais rien d'extrême, j'ai fais du tri dans mes programmes lancés au démarrage, lancé un Spybot qui s'est révélé infructueux, etc...

Par contre je ne m'y connais pas dans tout ce qui est base de registre, alors j'ai fais un scan Hijack dont voici le rapport. D'avance merci à ceux qui prendront le temps de répondre..! :)

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 17:44:56, on 20/08/2011
Platform: Windows Vista SP2 (WinNT 6.00.1906)
MSIE: Internet Explorer v8.00 (8.00.6001.19120)
Boot mode: Normal

Running processes:
C:\Windows\system32\Dwm.exe
C:\Windows\Explorer.EXE
C:\Program Files\DellTPad\Apoint.exe
C:\Program Files\McAfee.com\Agent\mcagent.exe
C:\Windows\System32\rundll32.exe
C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
C:\Program Files\3M\PSNLite\PsnLite.exe
C:\Windows\system32\wbem\unsecapp.exe
C:\Program Files\DellTPad\HidFind.exe
C:\PROGRA~1\3M\PSNLite\PSNGive.exe
C:\Program Files\DellTPad\Apntex.exe
C:\Users\ben-j\Downloads\HiJackThis.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Windows\system32\SearchFilterHost.exe
C:\Program Files\Mozilla Firefox\plugin-container.exe

R1 - HKCU\Software\Microsoft\Internet Explorer,SearchURL = http://www.cherche.us/keyword/%s
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.fr/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Internet Explorer fourni par Dell
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
R3 - URLSearchHook: Search Class - {08C06D61-F1F3-4799-86F8-BE1A89362C85} - C:\Program Files\Orange\SearchURLHook\SearchPageURL.dll (file missing)
O1 - Hosts: ::1 localhost
O2 - BHO: Aide pour le lien d'Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: McAfee Phishing Filter - {27B4851A-3207-45A2-B947-BE8AFE6163AB} - c:\progra~1\mcafee\msk\mskapbho.dll
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: Groove GFS Browser Helper - {72853161-30C5-4D22-B7F9-0BBC1D38A37E} - C:\Program Files\Microsoft Office\Office12\GrooveShellExtensions.dll
O2 - BHO: scriptproxy - {7DB2D5A0-7241-4E79-B68D-6309F01C5231} - C:\Program Files\Common Files\McAfee\SystemCore\ScriptSn.20110512211956.dll
O2 - BHO: Programme d'aide de l'Assistant de connexion Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: SkypeIEPluginBHO - {AE805869-2E5C-4ED4-8F7B-F1F7851A4497} - C:\Program Files\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O2 - BHO: Browser Address Error Redirector - {CA6319C0-31B7-401E-A518-A07C3DB8F777} - C:\Program Files\Dell\BAE\BAE.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O4 - HKLM\..\Run: [Apoint] C:\Program Files\DellTPad\Apoint.exe
O4 - HKLM\..\Run: [dscactivate] c:\dell\dsca.exe 3
O4 - HKLM\..\Run: [mcui_exe] "C:\Program Files\McAfee.com\Agent\mcagent.exe" /runkey
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\Windows\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [NVHotkey] rundll32.exe C:\Windows\system32\nvHotkey.dll,Start
O4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
O4 - HKCU\..\Run: [Steam] "C:\Program Files\Steam\Steam.exe" -silent
O4 - HKUS\S-1-5-19\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /detectMem (User '?')
O4 - HKUS\S-1-5-19\..\Run: [WindowsWelcomeCenter] rundll32.exe oobefldr.dll,ShowWelcomeCenter (User '?')
O4 - HKUS\S-1-5-20\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /detectMem (User '?')
O4 - HKUS\S-1-5-21-889239391-712508098-2849700604-1000\..\Run: [SpybotSD TeaTimer] C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe (User '?')
O4 - Global Startup: Post-it® Software Notes Lite.lnk = C:\Program Files\3M\PSNLite\PsnLite.exe
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Restrictions present
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O8 - Extra context menu item: Envoyer au périphérique &Bluetooth... - c:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie.htm
O8 - Extra context menu item: Envoyer l'&image au périphérique Bluetooth... - c:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie_ctx.htm
O9 - Extra button: Ajout Direct - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra 'Tools' menuitem: &Ajout Direct dans Windows Live Writer - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra button: Envoyer à OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra 'Tools' menuitem: &Envoyer à OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra button: PokerStars - {3AD14F0C-ED16-4e43-B6D8-661B03F6A1EF} - C:\Program Files\PokerStars\PokerStarsUpdate.exe
O9 - Extra button: (no name) - {8354F0FE-550E-4E14-AFE1-E5CEF9009311} - (no file)
O9 - Extra button: Skype Plug-In - {898EA8C8-E7FF-479B-8935-AEC46303B9E5} - C:\Program Files\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O9 - Extra 'Tools' menuitem: Skype Plug-In - {898EA8C8-E7FF-479B-8935-AEC46303B9E5} - C:\Program Files\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\Office12\REFIEBAR.DLL
O9 - Extra button: @btrez.dll,-4015 - {CCA281CA-C863-46ef-9331-5C8D4460577F} - c:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie.htm
O9 - Extra 'Tools' menuitem: @btrez.dll,-12650 - {CCA281CA-C863-46ef-9331-5C8D4460577F} - c:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie.htm
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O13 - Gopher Prefix:
O15 - Trusted Zone: *.chat-land.org
O15 - Trusted Zone: http://www.orange.fr
O16 - DPF: {C3F79A2B-B9B4-4A66-B012-3EE46475B072} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab56907.cab
O18 - Protocol: grooveLocalGWS - {88FED34C-F0CA-4636-A375-3CB6248B04CD} - C:\Program Files\Microsoft Office\Office12\GrooveSystemServices.dll
O18 - Protocol: skype-ie-addon-data - {91774881-D725-4E58-B298-07617B9B86A8} - C:\Program Files\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\COMMON~1\Skype\SKYPE4~1.DLL
O18 - Filter: application/x-ica - {CFB6322E-CC85-4d1b-82C7-893888A236BC} - C:\Program Files\Citrix\ICA Client\IcaMimeFilter.dll
O18 - Filter: application/x-ica; charset=euc-jp - {CFB6322E-CC85-4d1b-82C7-893888A236BC} - C:\Program Files\Citrix\ICA Client\IcaMimeFilter.dll
O18 - Filter: application/x-ica; charset=ISO-8859-1 - {CFB6322E-CC85-4d1b-82C7-893888A236BC} - C:\Program Files\Citrix\ICA Client\IcaMimeFilter.dll
O18 - Filter: application/x-ica; charset=MS936 - {CFB6322E-CC85-4d1b-82C7-893888A236BC} - C:\Program Files\Citrix\ICA Client\IcaMimeFilter.dll
O18 - Filter: application/x-ica; charset=MS949 - {CFB6322E-CC85-4d1b-82C7-893888A236BC} - C:\Program Files\Citrix\ICA Client\IcaMimeFilter.dll
O18 - Filter: application/x-ica; charset=MS950 - {CFB6322E-CC85-4d1b-82C7-893888A236BC} - C:\Program Files\Citrix\ICA Client\IcaMimeFilter.dll
O18 - Filter: application/x-ica; charset=UTF-8 - {CFB6322E-CC85-4d1b-82C7-893888A236BC} - C:\Program Files\Citrix\ICA Client\IcaMimeFilter.dll
O18 - Filter: application/x-ica; charset=UTF8 - {CFB6322E-CC85-4d1b-82C7-893888A236BC} - C:\Program Files\Citrix\ICA Client\IcaMimeFilter.dll
O18 - Filter: application/x-ica;charset=euc-jp - {CFB6322E-CC85-4d1b-82C7-893888A236BC} - C:\Program Files\Citrix\ICA Client\IcaMimeFilter.dll
O18 - Filter: application/x-ica;charset=ISO-8859-1 - {CFB6322E-CC85-4d1b-82C7-893888A236BC} - C:\Program Files\Citrix\ICA Client\IcaMimeFilter.dll
O18 - Filter: application/x-ica;charset=MS936 - {CFB6322E-CC85-4d1b-82C7-893888A236BC} - C:\Program Files\Citrix\ICA Client\IcaMimeFilter.dll
O18 - Filter: application/x-ica;charset=MS949 - {CFB6322E-CC85-4d1b-82C7-893888A236BC} - C:\Program Files\Citrix\ICA Client\IcaMimeFilter.dll
O18 - Filter: application/x-ica;charset=MS950 - {CFB6322E-CC85-4d1b-82C7-893888A236BC} - C:\Program Files\Citrix\ICA Client\IcaMimeFilter.dll
O18 - Filter: application/x-ica;charset=UTF-8 - {CFB6322E-CC85-4d1b-82C7-893888A236BC} - C:\Program Files\Citrix\ICA Client\IcaMimeFilter.dll
O18 - Filter: application/x-ica;charset=UTF8 - {CFB6322E-CC85-4d1b-82C7-893888A236BC} - C:\Program Files\Citrix\ICA Client\IcaMimeFilter.dll
O18 - Filter hijack: ica - {CFB6322E-CC85-4d1b-82C7-893888A236BC} - C:\Program Files\Citrix\ICA Client\IcaMimeFilter.dll
O20 - AppInit_DLLs: C:\PROGRA~1\Google\GOOGLE~2\GOEC62~1.DLL
O23 - Service: Application Driver Auto Removal Service (01) (appdrvrem01) - Protection Technology - C:\Windows\System32\appdrvrem01.exe
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files\Common Files\Apple\Mobile Device Support\AppleMobileDeviceService.exe
O23 - Service: Service Bonjour (Bonjour Service) - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: DSBrokerService - Unknown owner - C:\Program Files\DellSupport\brkrsvc.exe
O23 - Service: FLEXnet Licensing Service - Acresso Software Inc. - C:\Program Files\Common Files\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: GoogleDesktopManager - Google - C:\Program Files\Google\Google Desktop Search\GoogleDesktop.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\1050\Intel 32\IDriverT.exe
O23 - Service: Service de l'iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: lxba_device - - C:\Windows\system32\lxbacoms.exe
O23 - Service: Service McAfee Personal Firewall (McMPFSvc) - McAfee, Inc. - C:\Program Files\Common Files\Mcafee\McSvcHost\McSvHost.exe
O23 - Service: McAfee Services (mcmscsvc) - McAfee, Inc. - C:\Program Files\Common Files\McAfee\McSvcHost\McSvHost.exe
O23 - Service: McAfee VirusScan Announcer (McNaiAnn) - McAfee, Inc. - C:\Program Files\Common Files\McAfee\McSvcHost\McSvHost.exe
O23 - Service: McAfee Network Agent (McNASvc) - McAfee, Inc. - C:\Program Files\Common Files\McAfee\McSvcHost\McSvHost.exe
O23 - Service: McAfee Scanner (McODS) - McAfee, Inc. - C:\Program Files\McAfee\VirusScan\mcods.exe
O23 - Service: McAfee Proxy Service (McProxy) - McAfee, Inc. - C:\Program Files\Common Files\McAfee\McSvcHost\McSvHost.exe
O23 - Service: McShield - McAfee, Inc. - C:\Program Files\Common Files\McAfee\SystemCore\\mcshield.exe
O23 - Service: McAfee Firewall Core Service (mfefire) - McAfee, Inc. - C:\Program Files\Common Files\McAfee\SystemCore\\mfefire.exe
O23 - Service: McAfee Validation Trust Protection Service (mfevtp) - McAfee, Inc. - C:\Program Files\Common Files\McAfee\SystemCore\mfevtps.exe
O23 - Service: McAfee Anti-Spam Service (MSK80Service) - McAfee, Inc. - C:\Program Files\Common Files\Mcafee\McSvcHost\McSvHost.exe
O23 - Service: NVIDIA Display Driver Service (nvsvc) - NVIDIA Corporation - C:\Windows\system32\nvvsvc.exe
O23 - Service: RoxMediaDB9 - Unknown owner - C:\Program Files\Common Files\Roxio Shared\9.0\SharedCOM\RoxMediaDB9.exe (file missing)
O23 - Service: Roxio Hard Drive Watcher 9 (RoxWatch9) - Unknown owner - C:\Program Files\Common Files\Roxio Shared\9.0\SharedCOM\RoxWatch9.exe (file missing)
O23 - Service: SBSD Security Center Service (SBSDWSCService) - Safer Networking Ltd. - C:\Program Files\Spybot - Search & Destroy\SDWinSec.exe
O23 - Service: SigmaTel Audio Service (STacSV) - SigmaTel, Inc. - C:\Windows\system32\STacSV.exe
O23 - Service: StarWind AE Service (StarWindServiceAE) - StarWind Software - C:\Program Files\Alcohol Soft\Alcohol 120\StarWind\StarWindServiceAE.exe
O23 - Service: Steam Client Service - Valve Corporation - C:\Program Files\Common Files\Steam\SteamService.exe
O23 - Service: stllssvr - Unknown owner - C:\Program Files\Common Files\SureThing Shared\stllssvr.exe (file missing)
O23 - Service: XAudioService - Conexant Systems, Inc. - C:\Windows\system32\DRIVERS\xaudio.exe