Bruit dans l'unité centrale

Bonjour tout le monde, depuis quelques jours j'ai un souci, voila j'ai acheté mon Pc le 21/08/2006 : Packard Bell IMEDIA S9509
Disque dur 250 Go exploitation Windows Media center xp sp2 Intel pentium D CPU 2,80 GHZ 1 GO de Ram carte graphique Nvidia Geforce 7300SE et TNT intégrée. Je l'utilise beaucoup pour la vidéo montage et conversion, mais voila depuis quelques jours j'ai un bruit suspect dans mon unité centrale, et mon Pc ralenti un peu, pour mes disques durs, j'ai effectué une analyse complète avec mon antivirus F-Secure et spybot et également blbeta.exe ceux ci n'ont rien trouvé, j'ai donné un coup de CCleaner complet et défragementé mes disques avec Diskeeper, mais rien n'y fait, j'ai nettoyé l'intérieur de l'unité centrale avec un pinceau, là j'ai constaté pas mal de poussière surtout au niveau du ventilateur. Mais hélas le bruit persiste , le bruit ressemble fortement à celui d'un courant electrique et se trouve à peu près au niveau de l'alimentation (boitier recepteur du courant) et se déclenche environ à partir de 3 heures d'utilisation de mon pc mais c'est assez irrégulier genre 2 ou 3 petits coups toutes les 15 minutes, mais j'espère que ca ne va pas me sauter à la figure et j'ai pleins de fichiers stockés vidéos mp3 et autres.. environ 110 Go de fichiers et programmes, je ne tiens pas trop à les effacer car pour certains j'ai eu du mal à les trouver sur le web.Donc voila mon probleme s'il vous plait éclairer ma lanterne, j'espere qu'une personne parmi vous pourra me répondre, J'ai également fait des logs avec Brute Force Uninstaller et Hijackthis au cas ou cela pourrait etre utile. Je vous remercie de votre attention.

Log de Brute Force Uninstaller:

BFU v1.00.9
Windows XP SP2 (WinNT 5.01.2600 SP2)
Script started at 01:48:09, on 27/01/2007

Option Delete files to Recycle Bin: Yes
Failed: RegDelValue HKCU\software\microsoft\windows\currentversion\wintrust\trust providers\software publishing\trust database\0|ELECTRONIC GROUP (key not found)
Failed: DllUnregister C:\WINDOWS\system32\MSWBM32.DLL|1 (file not found)
Failed: DllUnregister C:\Program Files\MailSkinner\OESkinner.dll|1 (file not found)
Failed: FolderDelete C:\Program Files\dialpass (folder not found)
Failed: FolderDelete C:\Program Files\eghtmldialer (folder not found)
Failed: FolderDelete C:\Program Files\egroup (folder not found)
Failed: FolderDelete C:\Program Files\Instant Access (folder not found)
Failed: FolderDelete C:\Program Files\MailSkinner (folder not found)
Failed: FolderDelete C:\Program Files\InternetGameBox (folder not found)
Failed: FolderDelete C:\Program Files\GoRecord2 (folder not found)
Failed: FolderDelete C:\Program Files\GoAstro (folder not found)
Failed: FolderDelete C:\Program Files\SudoPlanet (folder not found)
Failed: FolderDelete C:\Program Files\WebMediaPlayer (folder not found)
Failed: FolderDelete C:\Program Files\MessengerSkinner (folder not found)
Failed: DllUnregister C:\WINDOWS\mslagent\2_mslagent.dll|1 (file not found)
Failed: DllUnregister C:\WINDOWS\navmpc\2_navmpc.dll|1 (file not found)
Failed: FolderDelete C:\WINDOWS\mslagent (folder not found)
Failed: FolderDelete C:\WINDOWS\navmpc (folder not found)
Failed: FolderDelete C:\WINDOWS\msskinner (folder not found)
Failed: FolderDelete C:\WINDOWS\wintrim (folder not found)
Failed: FolderDelete C:\WINDOWS\wincomp (folder not found)
Failed: FolderDelete C:\WINDOWS\winmgts (folder not found)
Failed: FolderDelete C:\WINDOWS\simcss (folder not found)
Failed: FolderDelete C:\WINDOWS\mc (folder not found)
Failed: FileDelete D:\DOCUME~1\Seb\LOCALS~1\Temp\~DFEC18.tmp (operation failed)
Failed: FolderCreate C:\WINDOWS\system32\bfubackups (folder already exists)
Script completed.

et enfin le Log de Hijackthis :

Logfile of HijackThis v1.99.1
Scan saved at 01:50:22, on 27/01/2007
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:\WINDOWS\system32\LEXBCES.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\LEXPPS.EXE
C:\PROGRA~1\PACKSE~1\backweb\361343\Program\SERVIC~1.EXE
D:\Program Files\Executive Software\DiskeeperLite\DKService.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\eHome\ehRecvr.exe
C:\Program Files\Pack Securite\backweb\361343\Program\fspex.exe
C:\WINDOWS\eHome\ehSched.exe
C:\Program Files\Pack Securite\Anti-Virus\fsgk32st.exe
C:\Program Files\Pack Securite\backweb\361343\program\fsbwsys.exe
C:\Program Files\Pack Securite\Anti-Virus\FSGK32.EXE
C:\Program Files\Pack Securite\Common\FSMA32.EXE
C:\Program Files\Pack Securite\Anti-Virus\fssm32.exe
C:\Program Files\Pack Securite\Common\FSMB32.EXE
C:\Program Files\Intel\Intel Matrix Storage Manager\iaantmon.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\Program Files\Pack Securite\Common\FCH32.EXE
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Pack Securite\Common\FAMEH32.EXE
C:\Program Files\Pack Securite\FSPC\fspc.exe
C:\Program Files\Pack Securite\Anti-Virus\fsrw.exe
C:\Program Files\Fichiers communs\Ulead Systems\DVD\ULCDRSvr.exe
C:\Program Files\Sonic\DigitalMedia LE v7\MyDVD LE\USBDeviceService.exe
C:\PROGRA~1\COMMON~1\X10\Common\x10nets.exe
C:\Program Files\Intel\IntelDH\Intel(R) Quick Resume Technology\ELService.exe
C:\WINDOWS\system32\Fast.exe
C:\Program Files\Pack Securite\Anti-Virus\fsav32.exe
C:\WINDOWS\system32\dllhost.exe
C:\Program Files\Pack Securite\FWES\Program\fsdfwd.exe
C:\Program Files\Pack Securite\Common\FSM32.EXE
C:\PROGRA~1\PACKSE~1\ANTI-S~1\fsaw.exe
C:\WINDOWS\system32\taskswitch.exe
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
C:\Program Files\QuickTime\qttask.exe
C:\WINDOWS\system32\LVCOMSX.EXE
C:\Program Files\Logitech\Video\LogiTray.exe
C:\Program Files\Pack Securite\FSGUI\fsguidll.exe
C:\Program Files\Java\jre1.5.0_10\bin\jusched.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Logitech\Video\FxSvr2.exe
D:\Documents and Settings\Seb\Mes documents\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = file://C:\APPS\IE\offline\fr.htm
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = file://C:\APPS\IE\offline\fr.htm
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = "C:\Program Files\Outlook Express\msimn.exe"
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: SweetIM For Internet Explorer - {BC4FFE41-DE9F-46fa-B455-AAD49B9F9938} - C:\Program Files\Macrogaming\SweetIMBarForIE\toolbar.dll
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: SWEETIE - {1A0AADCD-3A72-4b5f-900F-E3BB5A838E2A} - C:\PROGRA~1\MACROG~1\SWEETI~1\toolbar.dll
O2 - BHO: Megaupload Toolbar - {4E7BD74F-2B8D-469E-CCB0-B130EEDBE97C} - C:\PROGRA~1\MEGAUP~1\MEGAUP~1.DLL
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.5.0_10\bin\ssv.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar3.dll
O3 - Toolbar: SweetIM For Internet Explorer - {BC4FFE41-DE9F-46fa-B455-AAD49B9F9938} - C:\Program Files\Macrogaming\SweetIMBarForIE\toolbar.dll
O3 - Toolbar: Megaupload Toolbar - {4E7BD74F-2B8D-469E-CCB0-B130EEDBE97C} - C:\PROGRA~1\MEGAUP~1\MEGAUP~1.DLL
O3 - Toolbar: (no name) - {E0E899AB-F487-11D5-8D29-0050BA6940E3} - (no file)
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar3.dll
O4 - HKLM\..\Run: [F-Secure Manager] "C:\Program Files\Pack Securite\Common\FSM32.EXE" /splash
O4 - HKLM\..\Run: [F-Secure TNB] "C:\Program Files\Pack Securite\TNB\TNBUtil.exe" /CHECKALL /WAITFORSW
O4 - HKLM\..\Run: [F-Secure Startup Wizard] "C:\Program Files\Pack Securite\FSGUI\FSSW.EXE" /reboot
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [CoolSwitch] C:\WINDOWS\system32\taskswitch.exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [LVCOMSX] C:\WINDOWS\system32\LVCOMSX.EXE
O4 - HKLM\..\Run: [LogitechVideoRepair] C:\Program Files\Logitech\Video\ISStart.exe
O4 - HKLM\..\Run: [LogitechVideoTray] C:\Program Files\Logitech\Video\LogiTray.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.5.0_10\bin\jusched.exe"
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - Global Startup: Pack Securite.lnk = C:\Program Files\Pack Securite\backweb\361343\Program\fspex.exe
O8 - Extra context menu item: &Bloquer cette fenêtre publicitaire - C:\Program Files\Pack Securite\Anti-Spyware\blockpopups.htm
O8 - Extra context menu item: Download Link Using Mega Manager... - D:\Program Files\Megaupload\mm_file.htm
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_10\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_10\bin\ssv.dll
O9 - Extra button: Filtre Web - {200DB664-75B5-47c0-8B45-A44ACCF73C00} - C:\Program Files\Pack Securite\FSPC\fspcmsie.dll
O9 - Extra button: (no name) - {200DB664-75B5-47c0-8B45-A44ACCF73F01} - C:\Program Files\Pack Securite\FSPC\fspcmsie.dll
O9 - Extra 'Tools' menuitem: Filtre Web - {200DB664-75B5-47c0-8B45-A44ACCF73F01} - C:\Program Files\Pack Securite\FSPC\fspcmsie.dll
O9 - Extra button: Protection Internet Explorer - {300DB664-75B5-47c0-8B45-A44ACCF73C00} - C:\Program Files\Pack Securite\Anti-Spyware\ieshield.dll
O9 - Extra 'Tools' menuitem: Protection Internet Explorer... - {300DB664-75B5-47c0-8B45-A44ACCF73C00} - C:\Program Files\Pack Securite\Anti-Spyware\ieshield.dll
O9 - Extra button: Real.com - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - C:\WINDOWS\system32\Shdocvw.dll
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
O10 - Broken Internet access because of LSP provider 'winsflt.dll' missing
O11 - Options group: [INTERNATIONAL] International*
O14 - IERESET.INF: START_PAGE_URL=file://C:\APPS\IE\offline\fr.htm
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - https://goseb35.wordpress.com/
O16 - DPF: {867E13F2-7F31-44FB-AC97-CD38E0DC46EF} (HardwareDetection Control) - https://www.touslesdrivers.com/index.php?v_page=29
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsClient.cab31267.cab
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
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
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\FICHIE~1\Skype\SKYPE4~1.DLL
O21 - SSODL: WPDShServiceObj - {AAA288BA-9A4C-45B0-95D7-94D524869DB5} - C:\WINDOWS\system32\WPDShServiceObj.dll
O23 - Service: Pack Securite (BackWeb Plug-in - 361343) - BackWeb Technologies Inc. - C:\PROGRA~1\PACKSE~1\backweb\361343\Program\SERVIC~1.EXE
O23 - Service: Diskeeper - Executive Software International, Inc. - D:\Program Files\Executive Software\DiskeeperLite\DKService.exe
O23 - Service: Intel® Quick Resume Technology Drivers (ELService) - Intel Corporation - C:\Program Files\Intel\IntelDH\Intel(R) Quick Resume Technology\ELService.exe
O23 - Service: FSGKHS (F-Secure Gatekeeper Handler Starter) - F-Secure Corp. - C:\Program Files\Pack Securite\Anti-Virus\fsgk32st.exe
O23 - Service: fsbwsys - F-Secure Corp. - C:\Program Files\Pack Securite\backweb\361343\program\fsbwsys.exe
O23 - Service: F-Secure Anti-Virus Firewall Daemon (FSDFWD) - F-Secure Corporation - C:\Program Files\Pack Securite\FWES\Program\fsdfwd.exe
O23 - Service: F-Secure HTTP Server (fshttps) - F-Secure Corporation - C:\Program Files\Pack Securite\FSPC\fshttps\fshttps.exe
O23 - Service: F-Secure Management Agent (FSMA) - F-Secure Corporation - C:\Program Files\Pack Securite\Common\FSMA32.EXE
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: Intel(R) Matrix Storage Event Monitor (IAANTMon) - Intel Corporation - C:\Program Files\Intel\Intel Matrix Storage Manager\iaantmon.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Fichiers communs\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: LexBce Server (LexBceS) - Lexmark International, Inc. - C:\WINDOWS\system32\LEXBCES.EXE
O23 - Service: NBService - Nero AG - D:\Program Files\Nero 7\Nero BackItUp\NBService.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Ulead Burning Helper (UleadBurningHelper) - Ulead Systems, Inc. - C:\Program Files\Fichiers communs\Ulead Systems\DVD\ULCDRSvr.exe
O23 - Service: USBDeviceService - Unknown owner - C:\Program Files\Sonic\DigitalMedia LE v7\MyDVD LE\USBDeviceService.exe
O23 - Service: X10 Device Network Service (x10nets) - X10 - C:\PROGRA~1\COMMON~1\X10\Common\x10nets.exe

Merci encore.