Internet se ferme seul

Bonjour,


J'utilise IE 7.0 et Mozilla Firefox 3.0.1 ainsi que le Firewall PC Tools Firewall, l'antivirus PC Tools Antivirus et Spybot Serach & Destroy 1.6.0 et il arrive à l'occasion que lorsque je navigue sur Internet avec Mozilla ou Internet Explorer que ma fenêtre Internet se ferme sans raison ni même message d'erreur.

J'ai installé et scanné mon ordinateur avec le logiciel Malwarebytes Anti-Malware. Plusieurs fichiers infectés ont été effacés.

J'ai ensuite scanné mon ordinateur en mode sans échec avec les logiciels suivants :

- RogueRemover
- Smitfraudfix
- Clean
- SDFix

Malgré toutes ces démarches, j'ai toujours le même problème sur mon ordinateur. Que puis-je faire de plus ?

Voici mon rapport hikackthis :

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 11:42:36, on 2008-08-09
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16674)
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\svchost.exe
C:\Program Files\PC Tools Firewall Plus\FWService.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Ahead\InCD\InCDsrv.exe
C:\WINDOWS\system32\LEXBCES.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\LEXPPS.EXE
C:\WINDOWS\Explorer.EXE
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\Program Files\PC Tools AntiVirus\PCTAV.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Winamp Remote\bin\OrbTray.exe
C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
C:\Program Files\PC Tools Firewall Plus\FirewallGUI.exe
C:\Program Files\Winamp Remote\bin\Orb.exe
C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
C:\Program Files\PC Tools AntiVirus\PCTAVSvc.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\iPod\bin\iPodService.exe
C:\Program Files\Malwarebytes' Anti-Malware\mbam.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Documents and Settings\Jean-Bruno Giard\Desktop\scan.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,First Home Page = http://www.videotron.com/decouvrez-espace-client
R3 - URLSearchHook: Yahoo! Toolbar avec bloqueur de fenêtres pop-up - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - (no file)
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: AVG Safe Search - {3CA2F312-6F6E-4B53-A66E-4E65E497C8C0} - C:\Program Files\AVG\AVG8\avgssie.dll (file missing)
O2 - BHO: Spybot-S&D IE Protection - {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\jre1.6.0_02\bin\ssv.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: (no name) - {9030D464-4C02-4ABF-8ECC-5164760863C6} - (no file)
O2 - BHO: (no name) - {AA58ED58-01DD-4d91-8333-CF10577473F7} - (no file)
O2 - BHO: (no name) - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - (no file)
O2 - BHO: (no name) - {BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - (no file)
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [PCTAVApp] "C:\Program Files\PC Tools AntiVirus\PCTAV.exe" /MONITORSCAN
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [WINSOS VERIFY] "C:\Program Files\WINSOS\WINSOS.EXE" MINI
O4 - HKCU\..\Run: [Orb] "C:\Program Files\Winamp Remote\bin\OrbTray.exe" /background
O4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Program Files\Spybot - Search & Destroy\TeaTimer.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 - Startup: PC Tools Firewall Plus.lnk = C:\Program Files\PC Tools Firewall Plus\FirewallGUI.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office10\OSA.EXE
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_02\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_02\bin\ssv.dll
O9 - Extra button: (no name) - {85d1f590-48f4-11d9-9669-0800200c9a66} - C:\WINDOWS\bdoscandel.exe
O9 - Extra 'Tools' menuitem: Uninstall BitDefender Online Scanner v8 - {85d1f590-48f4-11d9-9669-0800200c9a66} - C:\WINDOWS\bdoscandel.exe
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
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: {0CCA191D-13A6-4E29-B746-314DEE697D83} (Facebook Photo Uploader 5) - http://upload.facebook.com/controls/FacebookPhotoUploader5.cab
O16 - DPF: {5D86DDB5-BDF9-441B-9E9E-D4730F4EE499} (BDSCANONLINE Control) - http://www.bitdefender.fr/scan_fr/scan8/oscan8.cab
O16 - DPF: {6262D3A0-531B-11CF-91F6-C2863C385E30} (Microsoft FlexGrid Control, version 6.0) - http://intranet1.mtl.cbc.ca/apps/eureka/AZ-Diagnostic/cab/Msflxgrd.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://www.update.microsoft.com/...
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://www.update.microsoft.com/...
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O23 - Service: Apple Mobile Device - Apple, Inc. - C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\1150\Intel 32\IDriverT.exe
O23 - Service: InCD Helper (InCDsrv) - Nero AG - C:\Program Files\Ahead\InCD\InCDsrv.exe
O23 - Service: Service de l'iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: LexBce Server (LexBceS) - Lexmark International, Inc. - C:\WINDOWS\system32\LEXBCES.EXE
O23 - Service: PC Tools AntiVirus Engine (PCTAVSvc) - PC Tools Research Pty Ltd - C:\Program Files\PC Tools AntiVirus\PCTAVSvc.exe
O23 - Service: PC Tools Firewall Plus (PCToolsFirewallPlus) - PC Tools - C:\Program Files\PC Tools Firewall Plus\FWService.exe