Pb de virus empechant installation d'avast

Bonjour,

je n'arive pas a installé d'anti virus avast je vous joins le rapport d'hijackthis
merci beaucoup d'avance

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 14:40:46, on 11/01/2008
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\svchost.exe
H:\WINDOWS\System32\svchost.exe
H:\WINDOWS\system32\spoolsv.exe
H:\WINDOWS\system32\RunDll32.exe
H:\Program Files\Fichiers communs\Microsoft Shared\Works Shared\WkUFind.exe
H:\WINDOWS\system32\hkcmd.exe
H:\WINDOWS\system32\igfxpers.exe
H:\Program Files\QuickTime\qttask.exe
H:\PROGRA~1\FICHIE~1\France Telecom\Shared Modules\FTRTSVC\0\FTRTSVC.exe
H:\Program Files\Orange HSS\Systray\SystrayApp.exe
H:\WINDOWS\system32\ctfmon.exe
H:\Program Files\Windows Live\Messenger\MsnMsgr.Exe
H:\WINDOWS\System32\svchost.exe
H:\Program Files\Orange HSS\Launcher\Launcher.exe
H:\PROGRA~1\FICHIE~1\France Telecom\Shared Modules\AlertModule\0\AlertModule.exe
H:\Program Files\Orange HSS\Deskboard\deskboard.exe
H:\Program Files\Orange HSS\connectivity\connectivitymanager.exe
H:\Program Files\iPod\bin\iPodService.exe
H:\Program Files\Orange HSS\connectivity\CoreCom\CoreCom.exe
H:\Program Files\Orange HSS\connectivity\CoreCom\OraConfigRecover.exe
H:\PROGRA~1\FICHIE~1\France Telecom\Shared Modules\FTCOMModule\0\FTCOMModule.exe
H:\WINDOWS\explorer.exe
H:\Program Files\Orange HSS\browser\browser.exe
H:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = https://www.bing.com/?cc=fr&toHttps=1&redig=55729C844D6A45819CAD368B3E178C9F
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page =
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = https://home.mcafee.com/StaticGenericPage.aspx?page=cookienotsupported&url=%2fSecure%2fProtected%2fLogin.aspx%3fErrCode%3dPLEASE_LOGIN%26culture%3den-US%26ctst%3d1\Program%20Files\McAfee.com\Agent\mcregwiz.exe&systempopup=true&affid=439-1
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: Search Class - {08C06D61-F1F3-4799-86F8-BE1A89362C85} - H:\Program Files\Orange HSS\SearchURLHook\SearchPageURL.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - H:\Program Files\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: (no name) - {549B5CA7-4A86-11D7-A4DF-000874180BB3} - (no file)
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: Programme d'aide de l'Assistant de connexion Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - H:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: (no name) - {FDD3B846-8D59-4ffb-8758-209B6AD74ACC} - (no file)
O4 - HKLM\..\Run: [Cmaudio] RunDll32 cmicnfg.cpl,CMICtrlWnd
O4 - HKLM\..\Run: [TkBellExe] "H:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [Microsoft Works Update Detection] H:\Program Files\Fichiers communs\Microsoft Shared\Works Shared\WkUFind.exe
O4 - HKLM\..\Run: [igfxtray] H:\WINDOWS\system32\igfxtray.exe
O4 - HKLM\..\Run: [igfxhkcmd] H:\WINDOWS\system32\hkcmd.exe
O4 - HKLM\..\Run: [igfxpers] H:\WINDOWS\system32\igfxpers.exe
O4 - HKLM\..\Run: [QuickTime Task] "H:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] "H:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [ORAHSSSessionManager] H:\Program Files\Orange HSS\SessionManager\SessionManager.exe
O4 - HKLM\..\Run: [SystrayORAHSS] "H:\Program Files\Orange HSS\Systray\SystrayApp.exe"
O4 - HKLM\..\Run: [avast!] H:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKCU\..\Run: [CTFMON.EXE] H:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [MoneyAgent] "H:\Program Files\Microsoft Money\System\mnyexpr.exe"
O4 - HKCU\..\Run: [MsnMsgr] "H:\Program Files\Windows Live\Messenger\MsnMsgr.Exe" /background
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')
O4 - Global Startup: Microsoft Office.lnk = H:\Program Files\Microsoft Office\Office\OSA9.EXE
O9 - Extra button: Titan Poker - {49783ED4-258D-4f9f-BE11-137C18D3E543} - H:\Poker\Titan Poker\casino.exe
O9 - Extra 'Tools' menuitem: Titan Poker - {49783ED4-258D-4f9f-BE11-137C18D3E543} - H:\Poker\Titan Poker\casino.exe
O9 - Extra button: (no name) - {85d1f590-48f4-11d9-9669-0800200c9a66} - H:\WINDOWS\bdoscandel.exe
O9 - Extra 'Tools' menuitem: Uninstall BitDefender Online Scanner v8 - {85d1f590-48f4-11d9-9669-0800200c9a66} - H:\WINDOWS\bdoscandel.exe
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
O9 - Extra button: Orange - {1462651F-F4BA-4C76-A001-C4284D0FE16E} - https://www.orange.fr/portail (file missing) (HKCU)
O12 - Plugin for .spop: H:\Program Files\Internet Explorer\Plugins\NPDocBox.dll
O15 - Trusted Zone: https://www.orange.fr/portail
O16 - DPF: {0B79F48A-E8D6-11DB-9283-E25056D89593} (F-Secure Online Scanner 3.1) - https://www.f-secure.com/en/home/support
O16 - DPF: {5D86DDB5-BDF9-441B-9E9E-D4730F4EE499} (BDSCANONLINE Control) - http://www.bitdefender.fr/scan_fr/scan8/oscan8.cab
O16 - DPF: {9A9307A0-7DA4-4DAF-B042-5009F29E09E1} (ActiveScan Installer Class) - http://acs.pandasoftware.com/activescan/as5free/asinst.cab
O23 - Service: France Telecom Routing Table Service (FTRTSVC) - France Telecom SA - H:\PROGRA~1\FICHIE~1\France Telecom\Shared Modules\FTRTSVC\0\FTRTSVC.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - H:\Program Files\Fichiers communs\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: iPod Service - Apple Computer, Inc. - H:\Program Files\iPod\bin\iPodService.exe
O23 - Service: McAfee Real-time Scanner (McShield) - Unknown owner - H:\PROGRA~1\McAfee\VIRUSS~1\mcshield.exe (file missing)
O23 - Service: McAfee SystemGuards (McSysmon) - Unknown owner - H:\PROGRA~1\McAfee\VIRUSS~1\mcsysmon.exe (file missing)