Probleme d'installation ie7

Bonjour,
j'ai un probleme depuis le debut du weekend je tente d'installer ie7 dans...rien.j'ai lu des plusieurs solutions sur différent forum et toujours rien.
j'ai un message qui dit : l'installation d'internet explorer ne c'est pas terminé...veuillez redémarrer.
ils me donnent un lien pour resoudre le probleme...https://support.microsoft.com/en-us
et voici mon ei7.log

[ie7.log]
0.594: ================================================================================
0.594: 2009/03/23 16:25:22.890 (local)
0.594: c:\74c2753f001e43f8b6a1a3f34b\update\update.exe (version 6.2.29.0)
0.969: Hotfix started with following command line: /quiet /norestart /er /log:C:\WINDOWS
1.172: IECUSTOM: Scanning for proper registry permissions...
2.203: IECUSTOM: Unwriteable key HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}
2.203: IECUSTOM: Unwriteable key HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}\ProxyStubClsid
2.203: IECUSTOM: Unwriteable key HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}
2.203: IECUSTOM: Unwriteable key HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}\ProxyStubClsid32
2.203: IECUSTOM: Unwriteable key HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}
2.203: IECUSTOM: Unwriteable key HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}\TypeLib
2.203: IECUSTOM: Unwriteable key HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}
2.203: IECUSTOM: Unwriteable key HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}\TypeLib
2.203: IECUSTOM: Unwriteable key HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}
3.250: IECUSTOM: Scanning for proper registry permissions...
3.641: IECUSTOM: Scanning for proper registry permissions...
4.172: IECUSTOM: Unwriteable key HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}
4.375: IECUSTOM: Backing up registry permissions...
4.562: IECUSTOM: Finished backing up registry permissions...
4.562: IECUSTOM: Setting new registry permissions...
4.578: IECUSTOM: Unable to clear DACLs HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}
4.578: IECUSTOM: Finished setting new registry permissions...
4.578: IECUSTOM: An error occured verifying registry permissions. ERROR: 0x80070534
4.578: DoInstallation: CustomizeCall Failed: 0x3f5
4.609: IECUSTOM: Restoring registry permissions...
4.641: IECUSTOM: Finished restoring registry permissions...
4.703: Impossible d'écrire la clé du Registre de configuration.
4.703: L'installation du Internet Explorer 7 ne s'est pas terminée.
4.703: Update.exe extended error code = 0x3f5
0.328: ================================================================================
0.328: 2009/03/23 20:06:37.093 (local)
0.328: c:\650690623b1512bcc8ddf1c0f65a\update\update.exe (version 6.2.29.0)
0.344: Hotfix started with following command line: /quiet /norestart /er /log:C:\WINDOWS
0.344: IECUSTOM: Scanning for proper registry permissions...
1.359: IECUSTOM: Unwriteable key HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}
1.359: IECUSTOM: Unwriteable key HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}\ProxyStubClsid
1.359: IECUSTOM: Unwriteable key HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}
1.359: IECUSTOM: Unwriteable key HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}\ProxyStubClsid32
1.359: IECUSTOM: Unwriteable key HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}
1.359: IECUSTOM: Unwriteable key HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}\TypeLib
1.359: IECUSTOM: Unwriteable key HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}
1.359: IECUSTOM: Unwriteable key HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}\TypeLib
1.359: IECUSTOM: Unwriteable key HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}
2.328: IECUSTOM: Scanning for proper registry permissions...
2.672: IECUSTOM: Scanning for proper registry permissions...
3.188: IECUSTOM: Unwriteable key HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}
3.375: IECUSTOM: Backing up registry permissions...
3.391: IECUSTOM: Finished backing up registry permissions...
3.391: IECUSTOM: Setting new registry permissions...
3.406: IECUSTOM: Unable to clear DACLs HKCR\Interface\{34A715A0-6587-11D0-924A-0020AFC7AC4D}
3.406: IECUSTOM: Finished setting new registry permissions...
3.406: IECUSTOM: An error occured verifying registry permissions. ERROR: 0x80070534
3.406: DoInstallation: CustomizeCall Failed: 0x3f5
3.406: IECUSTOM: Restoring registry permissions...
3.438: IECUSTOM: Finished restoring registry permissions...
3.469: Impossible d'écrire la clé du Registre de configuration.
3.469: L'installation du Internet Explorer 7 ne s'est pas terminée.
3.469: Update.exe extended error code = 0x3f5

Aidez moi svp!!!... merci a tous!