title: strange behavior saving a file with vim on Windows in a folder that requires elevated permission
body: <p>I'm editing the apache2.conf configuration file under the 'C:\Program Files...' folder. This folder requires elevated permission ("Start program as administrator") for writing to anywhere on this folder.</p>
  
  <p>Opening the file by mistake with vim without elevation - didn't show any warning. Moreover, I was able to save the file (':wq') just fine without any warning. Opening the file again with vim - showed me the modified file. However - no changes in the behavior of Apache (of course).</p>
  
  <p>Trying to open the file with Notepad - show me the file was not modified.</p>
  
  <p>Then, trying to open the file with vim from an elevated shell - I got the original file (just like notepad), but this time, I was able to edit the file, and save it.</p>
  
  <p>I know have two versions of the file. The real file (shown by notepad, elevated shell, just 'type' and seen by apache httpd), and the file I edited and saved from an unelevated shell - stored somewhere (where???).</p>
  
  <p>This is very uncomfortable, as sometime I open this file by mistake from a regular shell (even just for read).</p>
  
  <p>What is going on? How do I exit this state?</p>