If you possess a file specifically named Android_x86_installer_1.2.exe :
The installer comprised four functional modules: android x86 installer for windows 1.2
It is highly probable that you are referring to one of two things: android x86 installer for windows 1.2
: Choose how much space you want to dedicate to your Android system (usually 4GB to 16GB). android x86 installer for windows 1.2