git checkout Unlink of file try again

Unlink of file 'templates/media/container.html' failed. Should I try again? (y/n)

reason:

this could mean that another program is using the file, which is preventing git from "moving" the file into or out of the working directory when you are attempting to change branches. I have had this happen on Windows Vista where eclipse is the program "using" the file. The file may not be actually open in eclipse but may have been opened by a process run by eclipse. In this event, try closing the file in any applications that might have used it. If that doesn't work, completely exit any applications which may have opened the file.

緣由是：我本身打開了一些文件，這些文件是不一樣branch共用的。