Probleme avec IE explorer

Bonjour j'ai un probleme avec ie explorer quand je surfe sur internet parfois il m'affiche une erreur et ferme tout j'ai vu plusieurs problemes du meme type j'ai fais un rapport Hijackthis:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 17:46:23, on 21/12/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
Boot mode: Normal

Running processes:
H:\WINDOWS\System32\smss.exe
H:\WINDOWS\system32\winlogon.exe
H:\WINDOWS\system32\services.exe
H:\WINDOWS\system32\lsass.exe
H:\WINDOWS\system32\Ati2evxx.exe
H:\WINDOWS\system32\svchost.exe
H:\WINDOWS\System32\svchost.exe
H:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
H:\Program Files\Alwil Software\Avast4\ashServ.exe
H:\WINDOWS\system32\Ati2evxx.exe
H:\WINDOWS\Explorer.EXE
H:\WINDOWS\ehome\ehtray.exe
H:\Program Files\Neuf\Kit\WiFi\9wifi.exe
H:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
H:\Program Files\Java\jre1.5.0\bin\jusched.exe
H:\WINDOWS\system32\ctfmon.exe
H:\WINDOWS\system32\spoolsv.exe
H:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
H:\WINDOWS\eHome\ehRecvr.exe
H:\WINDOWS\eHome\ehSched.exe
H:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
H:\WINDOWS\system32\wscntfy.exe
H:\Program Files\Alwil Software\Avast4\ashWebSv.exe
H:\WINDOWS\eHome\ehmsas.exe
H:\WINDOWS\system32\dllhost.exe
H:\Program Files\Internet Explorer\iexplore.exe
H:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = www.google.fr
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.fr/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = www.generation-nt.com
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://recherche.neuf.fr/
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = http://recherche.neuf.fr/ie/default.html
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O4 - HKLM\..\Run: [ehTray] H:\WINDOWS\ehome\ehtray.exe
O4 - HKLM\..\Run: [High Definition Audio Property Page Shortcut] HDAShCut.exe
O4 - HKLM\..\Run: [Alcmtr] ALCMTR.EXE
O4 - HKLM\..\Run: [Autoconfigurateur WiFi Neuf] "H:\Program Files\Neuf\Kit\WiFi\9wifi.exe"
O4 - HKLM\..\Run: [avast!] H:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] H:\Program Files\Java\jre1.5.0\bin\jusched.exe
O4 - HKLM\..\Run: [NeroFilterCheck] H:\WINDOWS\system32\NeroCheck.exe
O4 - HKCU\..\Run: [CTFMON.EXE] H:\WINDOWS\system32\ctfmon.exe
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] H:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] H:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE RÉSEAU')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] H:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] H:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - H:\Program Files\Java\jre1.5.0\bin\npjpi150.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - H:\Program Files\Java\jre1.5.0\bin\npjpi150.dll
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - H:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - H:\Program Files\Messenger\msmsgs.exe
O14 - IERESET.INF: START_PAGE_URL=www.generation-nt.com
O17 - HKLM\System\CCS\Services\Tcpip\..\{A64FB287-BDD3-4740-9914-7815938D3680}: NameServer = 192.168.1.1
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - H:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - H:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: avast! Antivirus - ALWIL Software - H:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - H:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - H:\Program Files\Alwil Software\Avast4\ashWebSv.exe
O23 - Service: AVG Anti-Spyware Guard - GRISOFT s.r.o. - H:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe

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Je vous remercie d'avance