Set Variable ISWINDOWS64BIT to FALSE
Get System Setting Windows in 64 bit Mode into ISWINDOWS64BIT
if Variable ISWINDOWS64BIT Equals TRUE
  Set x64 - Native 64 bit Windows, AMD64 and EM64T Architectures - installation mode
  Set Variable MSXML60_X64 to TRUE
  Get Folder Location System->System Directory into MSXML60_WINDIR_X64
  Does File Exist $MSXML60_WINDIR_X64$\msxml6.dll (get result into variable MSXML60_X64)
  if Variable MSXML60_X64 Equals FALSE
    Set Variable PREREQ to TRUE
    Set Variable PRELIST to $PRELIST$$NEWLINE$Microsoft XML Parser 6.0 (x64)
  end
  Set Win32 - Native 32 bit Windows and Windows 32 on Windows 64 (WOW64) - installation mode
else
  MessageBox: $TITLE$ Setup, $TITLE$ requires a 64 bit operating system. Please upgrade your operating system and try again.$NEWLINE$$NEWLINE$$TITLE$ Setup cannot continue.
  Terminate Installation
end
 
