title: updated visual studio express, gives error c1853
body: <p>I've had VSE 2012 for a couple months now while I'm learning to program and I recently updated it to a newer version when it asked to update to "Update 1". Now when I try to compile all my C++ projects I get the following error:
  <code>error C1853: 'Debug\XXXXXX.pch' precompiled header file is from a previous version of the compiler, or the precompiled header is C++ and you are using it from C (or vice versa)   c:\XXX\visual studio 2012\projects\XXX\XXX XXX.cpp"</code>. 
  I had successfully compiled this program immediately before this update and have tried compiling old projects that I knew for sure worked before the update to no avail. New projects that I create work fine. I don't know that much about headers since I'm just starting out, but the header included by VSE 2012 update 1 is the same exact header that was given in my old projects when I created them before the update (<code>#include "stdafx.h"</code>) so I have no idea what's wrong and no idea what to google since googling the error didn't give much help. </p>