The uninstall-wubi option doesn't work.

When I try reinstalling it they show an error and tells me to check "wubi 12.04 rev266" log

Everything goes fine till the bottom which shows this

There is another file or directory with this name.
Please remove it before continuing.
Traceback (most recent call last):
  File "\lib\wubi\backends\common\tasklist.py", line 197, in __call__
  File "\lib\wubi\backends\win32\backend.py", line 81, in select_target_dir
Exception: Cannot install into C:\ubuntu.
There is another file or directory with this name.
Please remove it before continuing.
05-25 15:20 DEBUG  TaskList: # Cancelling tasklist
05-25 15:20 DEBUG  TaskList: # Finished tasklist
05-25 15:20 ERROR  root: Cannot install into C:\ubuntu.
There is another file or directory with this name.
Please remove it before continuing.
Traceback (most recent call last):
  File "\lib\wubi\application.py", line 58, in run
  File "\lib\wubi\application.py", line 132, in select_task
  File "\lib\wubi\application.py", line 158, in run_installer
  File "\lib\wubi\backends\common\tasklist.py", line 197, in __call__
  File "\lib\wubi\backends\win32\backend.py", line 81, in select_target_dir
Exception: Cannot install into C:\ubuntu.
There is another file or directory with this name.
Please remove it before continuing.

What do I do? I've tried the uninstall wubi option but all it shows is "reinstall using recommended settings which doesn't do anything"

okay i've tried installing it into another hardrive and i got this

Traceback (most recent call last): File "\lib\wubi\backends\common\tasklist.py", line 197, in call File "\lib\wubi\backends\win32\backend.py", line 117, in create_uninstaller File "\lib\wubi\backends\win32\registry.py", line 45, in set_value WindowsError: [Errno 5] Access is denied 05-26 16:12 DEBUG TaskList: # Cancelling tasklist 05-26 16:12 DEBUG TaskList: # Finished tasklist 05-26 16:12 ERROR root: [Errno 5] Access is denied Traceback (most recent call last): File "\lib\wubi\application.py", line 58, in run File "\lib\wubi\application.py", line 132, in select_task File "\lib\wubi\application.py", line 158, in run_installer File "\lib\wubi\backends\common\tasklist.py", line 197, in call File "\lib\wubi\backends\win32\backend.py", line 117, in create_uninstaller File "\lib\wubi\backends\win32\registry.py", line 45, in set_value WindowsError: [Errno 5] Access is denied