Un "rire" en continu sur mon ordinateur!

Bonjour! Depuis maintenant quelques jours j'ai un probleme assez particulier :

Lorsque je démare mon pc, tout est normal, mais apres quelque temps un son audio(un petit rire de bébé) se met en boucle sur mon ordinateur.

Expliquation: je chatte sur msn ou fait des recherches sur google et tout d'un coup j'entends un son en continue, un petit rire et impossible de voir d'ou cela provient! (aucun programme est ouvert et quand je fait ctrl+alt+delete je ne vois aucun fichier non plus) et le son ne s'arrete que lorque je coupe mon ordinateur bien sur! Cela est vraiment énervant car je ne peux plus écouter de la musique tranquillement mtn!

Aidez-moi svp!

Cest quoi un log hijackthis? et comment je fait pour en faire un?

Logfile of HijackThis v1.99.1
Scan saved at 20:21:27, on 1/06/2007
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\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Java\jre1.5.0_04\bin\jusched.exe
C:\Program Files\Java\jre1.5.0_04\bin\jucheck.exe
C:\Program Files\Intel\Intel Application Accelerator\iaanotif.exe
C:\Program Files\Creative\SBAudigy2ZS\Surround Mixer\CTSysVol.exe
C:\Program Files\Creative\SBAudigy2ZS\DVDAudio\CTDVDDET.EXE
C:\WINDOWS\system32\CTHELPER.EXE
C:\Program Files\CyberLink\PowerDVD\DVDLauncher.exe
C:\Program Files\Dell\Media Experience\DMXLauncher.exe
C:\WINDOWS\system32\dla\tfswctrl.exe
C:\WINDOWS\system32\rundll32.exe
C:\Program Files\QuickTime\qttask.exe
C:\Program Files\F-Secure\Common\FSM32.EXE
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
C:\Program Files\Icons\SetIcon.exe
C:\Program Files\HP\HP Software Update\HPWuSchd2.exe
C:\Program Files\HP\hpcoretech\hpcmpmgr.exe
C:\Program Files\MessengerPlus! 3\MsgPlus.exe
C:\program files\altnet\points manager\points manager.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\Program Files\Sony Ericsson\Mobile2\Application Launcher\Application Launcher.exe
C:\WINDOWS\System32\Rundll32.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Logitech\Desktop Messenger\8876480\Program\LogitechDesktopMessenger.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Fichiers communs\Teleca Shared\CapabilityManager.exe
C:\program files\valve\steam\steam.exe
C:\Program Files\Windows Media Player\WMPNSCFG.exe
C:\Program Files\AVerTV USB 2.0 Plus\QuickTV.exe
C:\Program Files\Belkin\Logiciel Bluetooth\BTTray.exe
C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
C:\Program Files\Logitech\SetPoint\KEM.exe
C:\Program Files\WinZip\WZQKPICK.EXE
C:\Program Files\Logitech\SetPoint\KHALMNPR.EXE
C:\Program Files\HP\Digital Imaging\bin\hpqgalry.exe
C:\PROGRA~1\F-Secure\BackWeb\7681197\Program\SERVIC~1.EXE
C:\Program Files\Belkin\Belkin Wireless Network Utility\WLService.exe
C:\Program Files\Belkin\Belkin Wireless Network Utility\WLanCfgG.exe
C:\Program Files\Belkin\Logiciel Bluetooth\bin\btwdins.exe
C:\WINDOWS\system32\CTsvcCDA.EXE
C:\Program Files\F-Secure\Anti-Virus\fsgk32st.exe
C:\Program Files\F-Secure\BackWeb\7681197\Program\F-Secure Automatic Update.exe
C:\Program Files\F-Secure\Anti-Virus\FSGK32.EXE
C:\Program Files\F-Secure\BackWeb\7681197\program\fsbwsys.exe
C:\Program Files\F-Secure\Common\FSMA32.EXE
C:\WINDOWS\System32\svchost.exe
C:\Program Files\F-Secure\Anti-Virus\fssm32.exe
C:\Program Files\F-Secure\Common\FSMB32.EXE
C:\Program Files\Intel\Intel Application Accelerator\iaantmon.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\F-Secure\Common\FCH32.EXE
C:\Program Files\F-Secure\Common\FAMEH32.EXE
C:\Program Files\Fichiers communs\Teleca Shared\Generic.exe
C:\Program Files\Sony Ericsson\Mobile\Mobile Phone Monitor\epmworker.exe
C:\Program Files\iPod\bin\iPodService.exe
C:\Program Files\F-Secure\Common\FNRB32.EXE
C:\Program Files\F-Secure\Common\FIH32.EXE
C:\Program Files\F-Secure\Anti-Virus\fsav32.exe
C:\Program Files\F-Secure\FWES\Program\fsdfwd.exe
C:\Program Files\MSN Messenger\msnmsgr.exe
C:\Program Files\F-Secure\FSGUI\fsguiexe.exe
C:\Program Files\iTunes\iTunes.exe
c:\program files\valve\steam\steamapps\mage_uscul\counter-strike source\hl2.exe
C:\PROGRA~1\Altnet\DOWNLO~1\asm.exe
C:\Program Files\Internet Explorer\iexplore.exe
D:\Utilisateur\Bureau\hijackthis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.euro.dell.com/
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.be/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.euro.dell.com/
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.euro.dell.com/
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = 192.33.235.132:80
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = localhost
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
N3 - Netscape 7: user_pref("browser.startup.homepage", "" ); (C:\Documents and Settings\Utilisateur\Application Data\Mozilla\Profiles\default\t1sj9twz.slt\prefs.js)
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: Skype add-on (mastermind) - {22BF413B-C6D2-4d91-82A9-A0F997BA588C} - C:\PROGRA~1\Skype\Phone\IEPlugin\SKYPEI~1.DLL
O2 - BHO: RXResultTracker Class - {59879FA4-4790-461c-A1CC-4EC4DE4CA483} - C:\Program Files\RXToolBar\sfcont.dll (file missing)
O2 - BHO: DriveLetterAccess - {5CA3D70E-1895-11CF-8E15-001234567890} - C:\WINDOWS\system32\dla\tfswshx.dll
O2 - BHO: ohb - {5ED7D3DE-6DBE-4516-8712-436325722327} - C:\WINDOWS\system32\SmartShopper\SmartShopper0.dll
O2 - BHO: AD Bot - {BCBCEE7B-2001-4971-B991-EB6E81C96CC5} - C:\WINDOWS\system32\adspipe.dll
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\jre1.5.0_04\bin\jusched.exe
O4 - HKLM\..\Run: [IAAnotif] C:\Program Files\Intel\Intel Application Accelerator\iaanotif.exe
O4 - HKLM\..\Run: [CTSysVol] C:\Program Files\Creative\SBAudigy2ZS\Surround Mixer\CTSysVol.exe /r
O4 - HKLM\..\Run: [CTDVDDET] "C:\Program Files\Creative\SBAudigy2ZS\DVDAudio\CTDVDDET.EXE"
O4 - HKLM\..\Run: [CTHelper] CTHELPER.EXE
O4 - HKLM\..\Run: [UpdReg] C:\WINDOWS\UpdReg.EXE
O4 - HKLM\..\Run: [DVDLauncher] "C:\Program Files\CyberLink\PowerDVD\DVDLauncher.exe"
O4 - HKLM\..\Run: [UpdateManager] "C:\Program Files\Fichiers communs\Sonic\Update Manager\sgtray.exe" /r
O4 - HKLM\..\Run: [DMXLauncher] C:\Program Files\Dell\Media Experience\DMXLauncher.exe
O4 - HKLM\..\Run: [dla] C:\WINDOWS\system32\dla\tfswctrl.exe
O4 - HKLM\..\Run: [BluetoothAuthenticationAgent] rundll32.exe bthprops.cpl,,BluetoothAuthenticationAgent
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [Sun ONE Synchronization - PocketPC] C:\Program Files\Fichiers communs\XCPCSync\Translators\PocketPC\AutoDetect.exe
O4 - HKLM\..\Run: [Sun ONE Synchronization - MSWinCE2] C:\Program Files\Fichiers communs\XCPCSync\Translators\MSWinCE2\AutoDetect.exe
O4 - HKLM\..\Run: [Sun ONE Synchronization - iPlanet] C:\Program Files\Fichiers communs\XCPCSync\Translators\iPlanet\iPlanetTray.exe
O4 - HKLM\..\Run: [F-Secure Manager] "C:\Program Files\F-Secure\Common\FSM32.EXE" /splash
O4 - HKLM\..\Run: [F-Secure TNB] "C:\Program Files\F-Secure\TNB\TNBUtil.exe" /CHECKALL /WAITFORSW
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [SetIcon] C:\Program Files\Icons\SetIcon.exe
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [HP Software Update] "C:\Program Files\HP\HP Software Update\HPWuSchd2.exe"
O4 - HKLM\..\Run: [HP Component Manager] "C:\Program Files\HP\hpcoretech\hpcmpmgr.exe"
O4 - HKLM\..\Run: [BearShare] "C:\Program Files\BearShare\BearShare.exe" /pause
O4 - HKLM\..\Run: [MessengerPlus3] "C:\Program Files\MessengerPlus! 3\MsgPlus.exe"
O4 - HKLM\..\Run: [winlogons.exe] C:\Program Files\KGB Spy\winlogons.exe
O4 - HKLM\..\Run: [SemanticInsight] C:\Program Files\RXToolBar\Semantic Insight\SemanticInsight.exe
O4 - HKLM\..\Run: [AltnetPointsManager] c:\program files\altnet\points manager\points manager.exe -s
O4 - HKLM\..\Run: [VideoraiPodConverter] C:\Program Files\VideoraiPodConverter\VideoraConverter.exe -t
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [Sony Ericsson PC Suite] "C:\Program Files\Sony Ericsson\Mobile2\Application Launcher\Application Launcher.exe" /startoptions
O4 - HKLM\..\Run: [xxy_Shell] C:\Documents and Settings\Utilisateur\xxy_jgch.exe
O4 - HKLM\..\Run: [adstart] C:\WINDOWS\System32\Rundll32.exe "C:\WINDOWS\system32\adspipe.dll" DllVerify
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [LDM] C:\Program Files\Logitech\Desktop Messenger\8876480\Program\LogitechDesktopMessenger.exe
O4 - HKCU\..\Run: [Steam] "c:\program files\valve\steam\steam.exe" -silent
O4 - HKCU\..\Run: [BitTorrent] "C:\Program Files\BitTorrent\bittorrent.exe" --force_start_minimized
O4 - HKCU\..\Run: [WMPNSCFG] C:\Program Files\Windows Media Player\WMPNSCFG.exe
O4 - Global Startup: AVerTV USB 2.0.lnk = C:\Program Files\AVerTV USB 2.0 Plus\QuickTV.exe
O4 - Global Startup: BTTray.lnk = ?
O4 - Global Startup: Démarrage rapide du logiciel HP Image Zone.lnk = C:\Program Files\HP\Digital Imaging\bin\hpqthb08.exe
O4 - Global Startup: F-Secure Automatic Update.lnk = C:\Program Files\F-Secure\BackWeb\7681197\program\F-Secure Automatic Update.exe
O4 - Global Startup: HP Digital Imaging Monitor.lnk = C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
O4 - Global Startup: Logitech Desktop Messenger.lnk = C:\Program Files\Logitech\Desktop Messenger\8876480\Program\LogitechDesktopMessenger.exe
O4 - Global Startup: Logitech SetPoint.lnk = C:\Program Files\Logitech\SetPoint\KEM.exe
O4 - Global Startup: WinZip Quick Pick.lnk = C:\Program Files\WinZip\WZQKPICK.EXE
O8 - Extra context menu item: &Search - http://ko.bar.need2find.com/KO/menusearch.html?p=KO
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~3\OFFICE11\EXCEL.EXE/3000
O8 - Extra context menu item: Envoyer à &Bluetooth - C:\Program Files\Belkin\Logiciel Bluetooth\btsendto_ie_ctx.htm
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_04\bin\npjpi150_04.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_04\bin\npjpi150_04.dll
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: Skype - {77BF5300-1474-4EC7-9980-D32B190E9B07} - C:\PROGRA~1\Skype\Phone\IEPlugin\SKYPEI~1.DLL
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~3\OFFICE11\REFIEBAR.DLL
O9 - Extra button: @btrez.dll,-4015 - {CCA281CA-C863-46ef-9331-5C8D4460577F} - C:\Program Files\Belkin\Logiciel Bluetooth\btsendto_ie.htm
O9 - Extra 'Tools' menuitem: @btrez.dll,-4017 - {CCA281CA-C863-46ef-9331-5C8D4460577F} - C:\Program Files\Belkin\Logiciel Bluetooth\btsendto_ie.htm
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: {1754A1BA-A1DF-4F10-B199-AA55AA1A120F} (InstallerBehaviorFactory Class) - https://signup.msn.com/pages/MsnInstC.cab
O16 - DPF: {56336BCB-3D8A-11D6-A00B-0050DA18DE71} (RdxIE Class) - http://software-dl.real.com/0719a8 [...] 601_fr.cab
O16 - DPF: {C3F79A2B-B9B4-4A66-B012-3EE46475B072} (MessengerStatsClient Class) - http://messenger.zone.msn.com/bina [...] b56907.cab
O16 - DPF: {F5A7706B-B9C0-4C89-A715-7A0C6B05DD48} (Minesweeper Flags Class) - http://messenger.zone.msn.com/bina [...] b56986.cab
O18 - Protocol: bwfile-8876480 - {9462A756-7B47-47BC-8C80-C34B9B80B32B} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\GAPlugProtocol-8876480.dll
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O18 - Filter: text/html - {2AB289AE-4B90-4281-B2AE-1F4BB034B647} - C:\Program Files\RXToolBar\sfcont.dll
O21 - SSODL: WPDShServiceObj - {AAA288BA-9A4C-45B0-95D7-94D524869DB5} - C:\WINDOWS\system32\WPDShServiceObj.dll
O23 - Service: F-Secure Automatic Update (BackWeb Plug-in - 7681197) - BackWeb Technologies Inc. - C:\PROGRA~1\F-Secure\BackWeb\7681197\Program\SERVIC~1.EXE
O23 - Service: Belkin 54g Wireless USB Network Adapter (Belkin 54g Wireless USB Network Adapter Service) - Unknown owner - C:\Program Files\Belkin\Belkin Wireless Network Utility\WLService.exe
O23 - Service: Bluetooth Service (btwdins) - WIDCOMM, Inc. - C:\Program Files\Belkin\Logiciel Bluetooth\bin\btwdins.exe
O23 - Service: Creative Service for CDROM Access - Creative Technology Ltd - C:\WINDOWS\system32\CTsvcCDA.EXE
O23 - Service: F-Secure Gatekeeper Handler Starter - F-Secure Corp. - C:\Program Files\F-Secure\Anti-Virus\fsgk32st.exe
O23 - Service: F-Secure Network Request Broker - F-Secure Corporation - C:\Program Files\F-Secure\Common\FNRB32.EXE
O23 - Service: fsbwsys - F-Secure Corp. - C:\Program Files\F-Secure\BackWeb\7681197\program\fsbwsys.exe
O23 - Service: F-Secure Anti-Virus Firewall Daemon (FSDFWD) - F-Secure Corporation - C:\Program Files\F-Secure\FWES\Program\fsdfwd.exe
O23 - Service: F-Secure Management Agent (FSMA) - F-Secure Corporation - C:\Program Files\F-Secure\Common\FSMA32.EXE
O23 - Service: IAA Event Monitor (IAANTMon) - Intel Corporation - C:\Program Files\Intel\Intel Application Accelerator\iaantmon.exe
O23 - Service: iPod Service - Apple Computer, Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: Service Norton AntiVirus Auto-Protect (navapsvc) - Unknown owner - C:\Program Files\Norton Internet Security\Norton AntiVirus\navapsvc.exe (file missing)
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: Remote Packet Capture Protocol v.0 (experimental) (rpcapd) - Unknown owner - %ProgramFiles%\WinPcap\rpcapd.exe" -d -f "%ProgramFiles%\WinPcap\rpcapd.ini (file missing)
O23 - Service: ScriptBlocking Service (SBService) - Unknown owner - C:\PROGRA~1\FICHIE~1\SYMANT~1\SCRIPT~1\SBServ.exe (file missing)

Personne pour m'aider?