title: How do I open a file in read/write mode in Vim?
body: <p>There is a particular file on my computer that Vim insists on opening in readonly mode.  I checked the permissions on the file (I have full control), and if I do :w!, writes happen just fine.  However, whether I open the file with :e or from NERDTree, the file opens as readonly.  All other files I open work just fine.</p>
  
  <p>I just want to know how to turn off readonly mode on this file, before or after I open it.</p>
  
  <p>I'm on Windows, using gVim</p>
  
  <p>EDIT:
  Its probably not a permissions issue, since :w! works just fine.</p>