Comment 3 for bug 468664

You're right, the relevant error is eaxactly here.

Translation :

>>stdout=
Traceback (most recent call last):
  File "\lib\wubi\application.py", line 56, in run
  File "\lib\wubi\application.py", line 130, in select_task
  File "\lib\wubi\application.py", line 156, in run_installer
  File "\lib\wubi\backends\common\tasklist.py", line 197, in __call__
  File "\lib\wubi\backends\win32\backend.py", line 629, in modify_bcd
  File "\lib\wubi\backends\common\utils.py", line 63, in run_command
Exception: Error executing command
>>command=C:\Windows\sysnative\bcdedit.exe /set {3c772ca6-c0e8-11de-9eaa-8bcc9858b477} device partition=T:
>>retval=1
>>stderr=An error occurred during the definition of the element of data.

This request is not taken.

In fact, the binary C:\Windows\sysnative\bcdedit.exe does not exist here. It is in C:\Windows\system32\