ie8 beta 2

Hola. He intentado instalar el EI8 beta 2 en español pero me da error.
Tengo
Xp sp3 actualizado. Aporto log de error que sale en el disco duro.

0.516: 2008/09/18 00:15:51.691 (local)
0.516: c:\714b69e3200b88ba9541\update\update.exe (version 6.3.15.0)
0.594: Hotfix started with following command line: /quiet /norestart /er
/log:C:\WINDOWS
0.641: In Function GetReleaseSet, line 1240, RegQueryValueEx failed with
error 0x2
0.672: IECUSTOM: Scanning for proper registry permissions...
1.047: IECUSTOM: Unwriteable key HKCR\.application
1.860: IECUSTOM: Scanning for proper registry permissions...
2.250: IECUSTOM: Scanning for proper registry permissions...
2.594: IECUSTOM: Unwriteable key HKCR\.application
2.750: IECUSTOM: Unwriteable key HKCR\xmlfile\DefaultIcon
2.766: IECUSTOM: Unwriteable key HKLM\SOFTWARE\Classes\xmlfile\DefaultIcon
2.844: IECUSTOM: Backing up registry permissions...
2.860: IECUSTOM: Finished backing up registry permissions...
2.860: IECUSTOM: Setting new registry permissions...
2.860: IECUSTOM: Unable to clear DACLs
HKLM\SOFTWARE\Classes\xmlfile\DefaultIcon
2.860: IECUSTOM: Finished setting new registry permissions...
2.860: IECUSTOM: An error occured verifying registry permissions. ERROR:
0x80070534
2.860: DoInstallation: CustomizeCall Failed: 0x3f5
2.891: IECUSTOM: Restoring registry permissions...
2.891: IECUSTOM: Finished restoring registry permissions...
2.891: No se puede escribir la clave del Registro de configuraciones.
2.906: La instalación de Internet Explorer 8 no ha finalizado.
2.906: Update.exe extended error code = 0x3f5