Virus, pubs, help!

Bonjour, à tous

Je m'apelle cecile et j'ai un problème avec mon ordinateur, des pubs s'affichent sans arrêt à l'écran, des programmes se lancent sans que je les autorisent :(

Je n'y connait pas grand chose à l'informatique et j'aimerai si possible un peu d'aide.

En faisant le tour du forum j'ai pu voir l'utilité du programme Hijackthis, je l'ai téléchargé, en voici une copie:

En esperant recevoir de l'aide je vous dis à bientôt.

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 16:29:23, on 31/10/2008
Platform: Windows Vista SP1 (WinNT 6.00.1905)
MSIE: Internet Explorer v7.00 (7.00.6001.18000)
Boot mode: Normal

Running processes:
C:\windows\system32\taskeng.exe
C:\windows\system32\Dwm.exe
C:\windows\Explorer.EXE
c:\Program Files\Hewlett-Packard\IAM\Bin\AsGHost.exe
C:\Program Files\ActivIdentity\ActivClient\accrdsub.exe
C:\Program Files\Hewlett-Packard\HP ProtectTools Security Manager\pthosttr.exe
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\Program Files\Hewlett-Packard\HP Wireless Assistant\HPWAMain.exe
C:\Program Files\SiteAdvisor\6173\SiteAdv.exe
C:\Program Files\Hewlett-Packard\File Sanitizer\CoreShredder.exe
C:\Program Files\Java\jre1.6.0_06\bin\jusched.exe
C:\Program Files\HP\HP Software Update\hpwuSchd2.exe
C:\Program Files\Analog Devices\Core\smax4pnp.exe
C:\Program Files\Spyware Terminator\SpywareTerminatorShield.Exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe
C:\Program Files\Common Files\LightScribe\LightScribeControlPanel.exe
C:\Program Files\WIDCOMM\Bluetooth Software\BTTray.exe
C:\Program Files\Windows Media Player\wmpnscfg.exe
C:\Program Files\Internet Explorer\iexplore.exe
c:\Program Files\ATI Technologies\ATI.ACE\Core-Static\MOM.exe
C:\Program Files\Hewlett-Packard\HP wireless Assistant\WiFiMsg.EXE
C:\Program Files\WIDCOMM\Bluetooth Software\BtStackServer.exe
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\CCC.exe
c:\Program Files\ActivIdentity\ActivClient\acevents.exe
C:\Program Files\Hewlett-Packard\Shared\HpqToaster.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Users\grosse cec\Desktop\HiJackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr?cobrand=hp-comm.msn.com&ocid=HPDHP&pc=CMDTDF
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?cobrand=hp-comm.msn.com&ocid=HPDHP&pc=CMDTDF
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\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
R3 - URLSearchHook: Yahoo! Toolbar avec bloqueur de fenêtres pop-up - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - (no file)
O1 - Hosts: ::1 localhost
O2 - BHO: (no name) - {089FD14D-132B-48FC-8861-0048AE113215} - C:\Program Files\SiteAdvisor\6173\SiteAdv.dll
O2 - BHO: BHO_Startup Class - {3134413B-49B4-425C-98A5-893C1F195601} - C:\Program Files\Hewlett-Packard\File Sanitizer\IEBHO.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_06\bin\ssv.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: Credential Manager for HP ProtectTools - {DF21F1DB-80C6-11D3-9483-B03D0EC10000} - c:\Program Files\Hewlett-Packard\IAM\Bin\ItIEAddIn.dll
O3 - Toolbar: McAfee SiteAdvisor - {0BF43445-2F28-4351-9252-17FE6E806AA0} - C:\Program Files\SiteAdvisor\6173\SiteAdv.dll
O4 - HKLM\..\Run: [Windows Defender] %ProgramFiles%\Windows Defender\MSASCui.exe -hide
O4 - HKLM\..\Run: [StartCCC] "c:\Program Files\ATI Technologies\ATI.ACE\Core-Static\CLIStart.exe"
O4 - HKLM\..\Run: [accrdsub] "c:\Program Files\ActivIdentity\ActivClient\accrdsub.exe"
O4 - HKLM\..\Run: [PTHOSTTR] c:\Program Files\Hewlett-Packard\HP ProtectTools Security Manager\PTHOSTTR.EXE /Start
O4 - HKLM\..\Run: [CognizanceTS] rundll32.exe c:\PROGRA~1\HEWLET~1\IAM\Bin\ASTSVCC.dll,RegisterModule
O4 - HKLM\..\Run: [PDF Complete] C:\Program Files\PDF Complete\pdfsty.exe
O4 - HKLM\..\Run: [SynTPEnh] C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [hpWirelessAssistant] C:\Program Files\Hewlett-Packard\HP Wireless Assistant\HPWAMain.exe
O4 - HKLM\..\Run: [HP Health Check Scheduler] c:\Program Files\Hewlett-Packard\HP Health Check\HPHC_Scheduler.exe
O4 - HKLM\..\Run: [MVS Splash] C:\Program Files\McAfee\Managed VirusScan\Agent\Splash.exe
O4 - HKLM\..\Run: [McAfee Managed Services Tray] C:\Program Files\McAfee\Managed VirusScan\Agent\StartMyAgtTry.Exe
O4 - HKLM\..\Run: [SiteAdvisor] C:\Program Files\SiteAdvisor\6173\SiteAdv.exe
O4 - HKLM\..\Run: [File Sanitizer] C:\Program Files\Hewlett-Packard\File Sanitizer\CoreShredder.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_06\bin\jusched.exe"
O4 - HKLM\..\Run: [WatchDog] C:\Program Files\InterVideo\DVD Check\DVDCheck.exe
O4 - HKLM\..\Run: [HP Software Update] c:\Program Files\Hp\HP Software Update\HPWuSchd2.exe
O4 - HKLM\..\Run: [SoundMAXPnP] C:\Program Files\Analog Devices\Core\smax4pnp.exe
O4 - HKLM\..\Run: [SoundMAX] C:\Program Files\Analog Devices\SoundMAX\soundmax.exe /tray
O4 - HKLM\..\Run: [SpywareTerminator] "C:\Program Files\Spyware Terminator\SpywareTerminatorShield.exe"
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe" /min
O4 - HKCU\..\Run: [WindowsWelcomeCenter] rundll32.exe oobefldr.dll,ShowWelcomeCenter
O4 - HKCU\..\Run: [LightScribe Control Panel] C:\Program Files\Common Files\LightScribe\LightScribeControlPanel.exe -hidden
O4 - HKCU\..\Run: [Start hide inside slow] "C:\ProgramData\fork htm inside.qyge99"
O4 - Global Startup: BTTray.lnk = ?
O4 - Global Startup: DVD Check.lnk = C:\Program Files\InterVideo\DVD Check\DVDCheck.exe
O8 - Extra context menu item: E&xport to 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: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_06\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_06\bin\ssv.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
O13 - Gopher Prefix:
O16 - DPF: {2D8ED06D-3C30-438B-96AE-4D110FDC1FB8} (ActiveScan 2.0 Installer Class) - http://acs.pandasoftware.com/activescan/cabs/as2stubie.cab
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (YInstStarter Class) - C:\Program Files\Yahoo!\Common\yinsthelper.dll
O20 - AppInit_DLLs: APSHook.dll
O23 - Service: ActivClient Middleware Service (accoca) - ActivIdentity - c:\Program Files\ActivIdentity\ActivClient\accoca.exe
O23 - Service: Andrea ADI Filters Service (AEADIFilters) - Andrea Electronics Corporation - C:\windows\system32\AEADISRV.EXE
O23 - Service: Avira AntiVir Personal - Free Antivirus Scheduler (AntiVirScheduler) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe
O23 - Service: Avira AntiVir Personal - Free Antivirus Guard (AntiVirService) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe
O23 - Service: Ati External Event Utility - ATI Technologies Inc. - C:\windows\system32\Ati2evxx.exe
O23 - Service: Bluetooth Service (btwdins) - Broadcom Corporation. - C:\Program Files\WIDCOMM\Bluetooth Software\bin\btwdins.exe
O23 - Service: EngineServer - McAfee, Inc. - C:\PROGRA~1\McAfee\MANAGE~1\VScan\ENGINE~1.EXE
O23 - Service: HP Health Check Service - Hewlett-Packard - c:\Program Files\Hewlett-Packard\HP Health Check\hphc_service.exe
O23 - Service: HP ProtectTools Service - Hewlett-Packard Development Company, L.P - c:\Program Files\Hewlett-Packard\HP ProtectTools Security Manager\PTChangeFilterService.exe
O23 - Service: Drive Encryption Service (HpFkCryptService) - SafeBoot International - c:\Program Files\Hewlett-Packard\Drive Encryption\HpFkCrypt.exe
O23 - Service: File Sanitizer for HP ProtectTools (HPFSService) - Hewlett-Packard - C:\Program Files\Hewlett-Packard\File Sanitizer\HPFSService.exe
O23 - Service: hpqwmiex - Hewlett-Packard Development Company, L.P. - C:\Program Files\Hewlett-Packard\Shared\hpqwmiex.exe
O23 - Service: HP Service (hpsrv) - Hewlett-Packard Corporation - C:\windows\system32\Hpservice.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\1050\Intel 32\IDriverT.exe
O23 - Service: IviRegMgr - InterVideo - C:\Program Files\Common Files\InterVideo\RegMgr\iviRegMgr.exe
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Hewlett-Packard Company - C:\Program Files\Common Files\LightScribe\LSSrvc.exe
O23 - Service: McAfee HackerWatch Service - McAfee, Inc. - C:\Program Files\Common Files\McAfee\HackerWatch\HWAPI.exe
O23 - Service: McShield - McAfee, Inc. - C:\PROGRA~1\McAfee\MANAGE~1\VScan\McShield.exe
O23 - Service: McAfee Personal Firewall Service (MpfService) - McAfee, Inc. - C:\Program Files\McAfee\MPF\MPFSrv.exe
O23 - Service: McAfee Virus and Spyware Protection Service (myAgtSvc) - McAfee, Inc. - C:\Program Files\McAfee\Managed VirusScan\Agent\myAgtSvc.Exe
O23 - Service: PDF Document Manager (pdfcDispatcher) - PDF Complete Inc - C:\Program Files\PDF Complete\pdfsvc.exe
O23 - Service: Remote Procedure Call (RPC) Net (rpcnet) - Absolute Software Corp. - C:\windows\system32\rpcnet.exe
O23 - Service: SiteAdvisor Service - Unknown owner - C:\Program Files\SiteAdvisor\6173\SAService.exe
O23 - Service: Spyware Terminator Realtime Shield Service (sp_rssrv) - Crawler.com - C:\Program Files\Spyware Terminator\sp_rsser.exe