title: Visual Studio 2017 errors on standard headers
body: <p>I just upgraded to Visual Studio 2017 Community Edition and I have trouble loading standard header files. I get 507 errors from various header files. Here are some snippets:</p>
  
  <p>Some of the errors:</p>
  
  <pre><code>Severity    Code    Description Project File    Line    Suppression State
  Error (active)  E1696   cannot open source file "errno.h"   RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cerrno  7   
  Error (active)  E1696   cannot open source file "float.h"   RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cfloat  7   
  Error (active)  E0282   the global scope has no "acosf" RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cmath   629 
  Error (active)  E0282   the global scope has no "asinf" RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cmath   629 
  Error (active)  E0282   the global scope has no "atanf" RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cmath   630 
  Error (active)  E0282   the global scope has no "atan2f"    RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cmath   630 
  Error (active)  E0282   the global scope has no "ceilf" RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cmath   630 
  Error (active)  E0282   the global scope has no "cosf"  RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cmath   631 
  Error (active)  E0282   the global scope has no "coshf" RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cmath   631 
  Error (active)  E0282   the global scope has no "swprintf"  RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  21  
  Error (active)  E0282   the global scope has no "swscanf"   RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  21  
  Error (active)  E0282   the global scope has no "ungetwc"   RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  21  
  Error (active)  E0282   the global scope has no "vfwprintf" RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  22  
  Error (active)  E0282   the global scope has no "vswprintf" RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  22  
  Error (active)  E0282   the global scope has no "vwprintf"  RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  22  
  Error (active)  E0282   the global scope has no "wcrtomb"   RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  23  
  Error (active)  E0282   the global scope has no "wprintf"   RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  23  
  Error (active)  E0282   the global scope has no "wscanf"    RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  23  
  Error (active)  E0282   the global scope has no "wcsrtombs" RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  24  
  Error (active)  E0282   the global scope has no "wcstol"    RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  24  
  Error (active)  E0282   the global scope has no "wcscat"    RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  24  
  Error (active)  E0282   the global scope has no "wcschr"    RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  25  
  Error (active)  E0282   the global scope has no "wcscmp"    RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  25  
  Error (active)  E0282   the global scope has no "wcscoll"   RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  25  
  Error (active)  E0282   the global scope has no "wcscpy"    RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  26  
  Error (active)  E0282   the global scope has no "wcscspn"   RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  26  
  Error (active)  E0282   the global scope has no "wcslen"    RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  26  
  Error (active)  E0282   the global scope has no "wcsncat"   RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  27  
  Error (active)  E0282   the global scope has no "wcsncmp"   RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  27  
  Error (active)  E0282   the global scope has no "wcsncpy"   RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  27  
  Error (active)  E0282   the global scope has no "wcspbrk"   RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\cwchar  28  
  Error (active)  E0282   the global scope has no "wcsrchr"   RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools
  Error (active)  E0260   explicit type is missing ('int' assumed)    RPGWorld    c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.10.25017\include\xtgmath.h   212 
  Error (active)  E0757   variable "size_t" is not a type name    RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\packages\sfml-system.2.4.0.0\build\native\include\SFML\Graphics\Glsl.inl    40  
  Error (active)  E0757   variable "size_t" is not a type name    RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\packages\sfml-system.2.4.0.0\build\native\include\SFML\Graphics\Texture.hpp 159 
  Error (active)  E0757   variable "size_t" is not a type name    RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\packages\sfml-system.2.4.0.0\build\native\include\SFML\Graphics\VertexArray.hpp 64  
  Error (active)  E0757   variable "size_t" is not a type name    RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\packages\sfml-system.2.4.0.0\build\native\include\SFML\Graphics\VertexArray.hpp 72  
  Error (active)  E0757   variable "size_t" is not a type name    RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\packages\sfml-system.2.4.0.0\build\native\include\SFML\Graphics\VertexArray.hpp 88  
  Error (active)  E0757   variable "size_t" is not a type name    RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\packages\sfml-system.2.4.0.0\build\native\include\SFML\Graphics\VertexArray.hpp 104 
  Error (active)  E0757   variable "size_t" is not a type name    RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\packages\sfml-system.2.4.0.0\build\native\include\SFML\Graphics\VertexArray.hpp 129 
  Error (active)  E0757   variable "size_t" is not a type name    RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\packages\sfml-system.2.4.0.0\build\native\include\SFML\System\String.hpp    58  
  Error (active)  E0757   variable "size_t" is not a type name    RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\packages\sfml-system.2.4.0.0\build\native\include\SFML\System\String.hpp    332 
  Error (active)  E0757   variable "size_t" is not a type name    RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\packages\sfml-system.2.4.0.0\build\native\include\SFML\System\String.hpp    345 
  Error (active)  E0757   variable "size_t" is not a type name    RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\packages\sfml-system.2.4.0.0\build\native\include\SFML\System\String.hpp    365 
  Error (active)  E0757   variable "size_t" is not a type name    RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\packages\sfml-system.2.4.0.0\build\native\include\SFML\System\String.hpp    387 
  Error (active)  E0757   variable "size_t" is not a type name    RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\packages\sfml-system.2.4.0.0\build\native\include\SFML\System\String.hpp    387 
  Error (active)  E0757   variable "size_t" is not a type name    RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\packages\sfml-system.2.4.0.0\build\native\include\SFML\System\String.hpp    399 
  Error (active)  E0757   variable "size_t" is not a type name    RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\packages\sfml-system.2.4.0.0\build\native\include\SFML\System\String.hpp    413 
  Error (active)  E0757   variable "size_t" is not a type name    RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\packages\sfml-system.2.4.0.0\build\native\include\SFML\System\String.hpp    413 
  Error (active)  E0757   variable "size_t" is not a type name    RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\packages\sfml-system.2.4.0.0\build\native\include\SFML\System\String.hpp    427 
  Error (active)  E0757   variable "size_t" is not a type name    RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\packages\sfml-system.2.4.0.0\build\native\include\SFML\System\String.hpp    427 
  Error (active)  E0757   variable "size_t" is not a type name    RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\packages\sfml-system.2.4.0.0\build\native\include\SFML\System\String.hpp    456 
  Error (active)  E0757   variable "size_t" is not a type name    RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\packages\sfml-system.2.4.0.0\build\native\include\SFML\System\String.hpp    456 
  Error (active)  E0020   identifier "rand" is undefined  RPGWorld    c:\Users\Fazil\Documents\Visual Studio 2017\Projects\Local\RPGWorld\RPGWorld\Blocks.cpp 23  
  Error   C1083   Cannot open include file: 'corecrt.h': No such file or directory    RPGWorld    c:\program files (x86)\microsoft visual studio\2017\community\vc\tools\msvc\14.10.25017\include\crtdefs.h   10  
  Error   C1083   Cannot open include file: 'corecrt.h': No such file or directory    RPGWorld    c:\program files (x86)\microsoft visual studio\2017\community\vc\tools\msvc\14.10.25017\include\crtdefs.h   10  
  Error   C1083   Cannot open include file: 'corecrt.h': No such file or directory    RPGWorld    c:\program files (x86)\microsoft visual studio\2017\community\vc\tools\msvc\14.10.25017\include\crtdefs.h   10  
  Error   C1083   Cannot open include file: 'corecrt.h': No such file or directory    RPGWorld    c:\program files (x86)\microsoft visual studio\2017\community\vc\tools\msvc\14.10.25017\include\crtdefs.h   10  
  Error   C1083   Cannot open include file: 'corecrt.h': No such file or directory    RPGWorld    c:\program files (x86)\microsoft visual studio\2017\community\vc\tools\msvc\14.10.25017\include\crtdefs.h   10  
  Error   C1083   Cannot open include file: 'corecrt.h': No such file or directory    RPGWorld    c:\program files (x86)\microsoft visual studio\2017\community\vc\tools\msvc\14.10.25017\include\crtdefs.h   10  
  Error   C1083   Cannot open include file: 'corecrt.h': No such file or directory    RPGWorld    c:\program files (x86)\microsoft visual studio\2017\community\vc\tools\msvc\14.10.25017\include\crtdefs.h   10  
  Error   C1083   Cannot open include file: 'corecrt.h': No such file or directory    RPGWorld    c:\program files (x86)\microsoft visual studio\2017\community\vc\tools\msvc\14.10.25017\include\crtdefs.h   10  
  </code></pre>
  
  <p>I never had this issue with Visual Studio 2015 Community Edition. Am I missing some component from the Installer? Any help would be appreciated. Thank you!</p>