title: Cannot compile Windows app with C++ Builder 10.1 Berlin Update 2
body: <p>I installed RAD Studio 10.1 Update 2 using the web installer. It uninstalled the previous 10.1 Update 1 and performed everything without error messages.</p>
  
  <p>The new version is able to build C++ projects for Android, iOS, and Mac OSX. But when I try to compile projects for Win32, both VCL and FMX, I get this unexpected error: </p>
  
  <pre><code>[bcc32 Error] windows.h(1): E2209 Unable to open include file 'winapifamily.h'
    Full parser context
      Project1.cpp(3): #include c:\program files (x86)\embarcadero\studio\18.0\include\windows\vcl\vcl.h
      vcl.h(10): #include c:\program files (x86)\embarcadero\studio\18.0\include\windows\vcl\basepch0.h
      basepch0.h(62): #include c:\program files (x86)\embarcadero\studio\18.0\include\windows\rtl\System.hpp
      System.hpp(19): #include c:\program files (x86)\embarcadero\studio\18.0\include\windows\rtl\sysmac.h
      sysmac.h(141): #include c:\program files (x86)\embarcadero\studio\18.0\include\windows\sdk\windows.h
  </code></pre>