windows - Delete a file that could not be found by CMD

(My problem is in Windows XP, but i suppose it could be extended to other Windows OSes as well.)

I am trying to delete a file named "Σâ└í", which could not be deleted even by the "del" command in CMD, with the reason that "the file could not be found." However, the command:

dir /s /b /o:gn

does display the file in that folder contents list. Also, i am unable to delete its parent folder with a "rd" command, with the reason being "the directory is not empty". This file occupies 1.87 GB on the drive, so no question of it not existing. There is another file named "low" in the same folder, which is shown to occupy 0 KB on the disk. Both the files seem to have no extensions. I also tried the "Unlocker" program, the CMD steps in Safe Mode, none of which worked.

What should I do to delete this stubborn file?