IE7 très lent et quelque fois erreur 404

Bonjour,
j'ai un problème avec mon ie7, je ne peux pas acceder a sourceforge.net et le software de logitech Harmony remote (525) se lance très très lentement (il lui faut plus d'une heure) et il est impossible de faire qqch tellement c'est lent... J'ai aussi de temps en temps des erreurs 404 sur ie7 !!! J'ai essayé de restaure une date antérieure a mon Windows mais sans succes, j'ai aussi arreté tous les firewall, anti-virus (Mcaffee) etc mais sans succes...

Que faire??

Voici une liste de HIjackThis.. Merci 1000x si qqn connait bien le truc et peux me dire quel est mon problème...

Logfile of HijackThis v1.97.7
Scan saved at 20:24:56, on 11.07.2009
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16850)

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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\RTHDCPL.EXE
C:\Program Files\Dell Support Center\bin\sprtcmd.exe
C:\Program Files\McAfee.com\Agent\mcagent.exe
C:\Program Files\Dell\MFP_DELL\deDvcStatus.exe
C:\Program Files\ScanSoft\OmniPageSE4\OpwareSE4.exe
C:\WINDOWS\system32\rundll32.exe
C:\Program Files\CyberLink\PowerDVD DX\PDVDDXSrv.exe
C:\Program Files\Pinnacle\Shared Files\Programs\Remote\Remoterm.exe
C:\WINDOWS\System32\DLA\DLACTRLW.EXE
C:\Program Files\Logitech\iTouch\iTouch.exe
C:\Program Files\Google\Google Desktop Search\GoogleDesktop.exe
C:\PROGRA~1\MI948F~1\GAMECO~1\Common\SWTrayV4.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\Program Files\Google\Google Desktop Search\GoogleDesktop.exe
C:\Program Files\Java\jre6\bin\jusched.exe
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\MOM.exe
C:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
C:\Program Files\QuickTime\QTTask.exe
C:\Program Files\Bonjour\mDNSResponder.exe
C:\Program Files\Logitech\MouseWare\system\em_exec.exe
C:\Program Files\Google\Google Desktop Search\GoogleDesktop.exe
C:\Program Files\Dell\MFP_DELL\deMntrService.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Java\jre6\bin\jqs.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\PROGRA~1\McAfee\MSC\mcmscsvc.exe
C:\Program Files\Belkin\Switch2\Switch2.exe
c:\PROGRA~1\FICHIE~1\mcafee\mna\mcnasvc.exe
c:\PROGRA~1\FICHIE~1\mcafee\mcproxy\mcproxy.exe
C:\PROGRA~1\McAfee\VIRUSS~1\mcshield.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\Program Files\McAfee\MPF\MPFSrv.exe
C:\Program Files\McAfee\MSK\MskSrver.exe
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\ccc.exe
C:\Program Files\Dell Support Center\bin\sprtsvc.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\iPod\bin\iPodService.exe
C:\WINDOWS\System32\wbem\wmiapsrv.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\wuauclt.exe
C:\PROGRA~1\McAfee\VIRUSS~1\mcsysmon.exe
C:\Program Files\Spybot - Search & Destroy\Hijack\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.rtn.ch/scripts/index.aspx?idz=3
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
O2 - BHO: (no name) - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: McAfee Phishing Filter - {27B4851A-3207-45A2-B947-BE8AFE6163AB} - c:\PROGRA~1\mcafee\msk\mskapbho.dll
O2 - BHO: (no name) - {5CA3D70E-1895-11CF-8E15-001234567890} - C:\WINDOWS\System32\DLA\DLASHX_W.DLL
O2 - BHO: scriptproxy - {7DB2D5A0-7241-4E79-B68D-6309F01C5231} - c:\PROGRA~1\mcafee\VIRUSS~1\scriptsn.dll
O2 - BHO: (no name) - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Program Files\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [Alcmtr] ALCMTR.EXE
O4 - HKLM\..\Run: [%PROVIDERID%] "bin\sprtcmd.exe" /P %PROVIDERID%
O4 - HKLM\..\Run: [dscactivate] "C:\Program Files\Dell Support Center\gs_agent\custom\dsca.exe"
O4 - HKLM\..\Run: [DellSupportCenter] "C:\Program Files\Dell Support Center\bin\sprtcmd.exe" /P DellSupportCenter
O4 - HKLM\..\Run: [mcagent_exe] "C:\Program Files\McAfee.com\Agent\mcagent.exe" /runkey
O4 - HKLM\..\Run: [DeStatusMon] "C:\Program Files\Dell\MFP_DELL\deDvcStatus.exe" dvcStatusMinimize
O4 - HKLM\..\Run: [SSBkgdUpdate] "C:\Program Files\Fichiers communs\Scansoft Shared\SSBkgdUpdate\SSBkgdupdate.exe" -Embedding -boot
O4 - HKLM\..\Run: [OpwareSE4] "C:\Program Files\ScanSoft\OmniPageSE4\OpwareSE4.exe"
O4 - HKLM\..\Run: [ScanSoft OmniPage SE 4-reminder] "C:\Program Files\ScanSoft\OmniPageSE4\Ereg\Ereg.exe" -r "C:\Documents and Settings\All Users\Application Data\ScanSoft\OmniPageSE4.0\Ereg\Ereg.ini
O4 - HKLM\..\Run: [BluetoothAuthenticationAgent] rundll32.exe bthprops.cpl,,BluetoothAuthenticationAgent
O4 - HKLM\..\Run: [PDVDDXSrv] "C:\Program Files\CyberLink\PowerDVD DX\PDVDDXSrv.exe"
O4 - HKLM\..\Run: [RoxWatchTray] "C:\Program Files\Fichiers communs\Roxio Shared\10.0\SharedCOM\RoxWatchTray10.exe"
O4 - HKLM\..\Run: [PMCRemote] C:\Program Files\Pinnacle\Shared Files\\Programs\Remote\Remoterm.exe
O4 - HKLM\..\Run: [DLA] C:\WINDOWS\System32\DLA\DLACTRLW.EXE
O4 - HKLM\..\Run: [zBrowser Launcher] C:\Program Files\Logitech\iTouch\iTouch.exe
O4 - HKLM\..\Run: [Logitech Utility] Logi_MwX.Exe
O4 - HKLM\..\Run: [Google Desktop Search] "C:\Program Files\Google\Google Desktop Search\GoogleDesktop.exe" /startup
O4 - HKLM\..\Run: [SideWinderTrayV4] C:\PROGRA~1\MI948F~1\GAMECO~1\Common\SWTrayV4.exe
O4 - HKLM\..\Run: [AppleSyncNotifier] C:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleSyncNotifier.exe
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [StartCCC] "C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\CLIStart.exe" MSRun
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre6\bin\jusched.exe"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [NSLauncher] C:\Program Files\Nokia\Nokia Software Launcher\NSLauncher.exe /startup
O4 - HKLM\..\Run: [Pinnacle WebUpdater] "C:\Program Files\Pinnacle\Shared Files\Programs\WebUpdater\WebUpdater.exe" -s -f=UpdateVersion.xml -url=http://cdn.pinnaclesys.com/SupportFiles
O4 - HKLM\..\Run: [PinnacleDriverCheck] C:\WINDOWS\system32\PSDrvCheck.exe -CheckReg
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [DellSupportCenter] "C:\Program Files\Dell Support Center\bin\sprtcmd.exe" /P DellSupportCenter
O4 - Startup: Switch2.lnk = ?
O4 - Global Startup: Logitech Desktop Messenger.lnk = C:\Program Files\Logitech\Desktop Messenger\8876480\Program\LDMConf.exe
O9 - Extra button: Recherche (HKLM)
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 (HKLM)
O9 - Extra button: Messenger (HKLM)
O9 - Extra 'Tools' menuitem: Windows Messenger (HKLM)
O10 - Unknown file in Winsock LSP: c:\program files\bonjour\mdnsnsp.dll
O11 - Options group: [INTERNATIONAL] International*
O16 - DPF: {3B36B017-7E49-426B-95B0-B5CECD83C2E2} (IfolorUploader Control) - http://chkr-web.ifolor.net/ORDERINGGENERAL/LowRes/app_support/ActiveX/IfolorUploader_chkr.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://www.update.microsoft.com/...
O16 - DPF: {8FFBE65D-2C9C-4669-84BD-5829DC0B603C} - http://fpdownload.macromedia.com/get/flashplayer/current/polarbear/ultrashim.cab
O16 - DPF: {CF40ACC5-E1BB-4AFF-AC72-04C2F616BCA7} (get_atlcom Class) - http://wwwimages.adobe.com/www.adobe.com/products/acrobat/nos/gp.cab