Qt creator :: compiler

i installed the Qt libraries 4.8.4 for Windows (VS 2010) and then I installed the latest version of Qt creator. I used a MinGw compiler .. this way https://docs.google.com/file/d/0B3vywie-X5zuUmVWODJEbDhyUHc/edit?ups=drive_web and after the first try I got this : https://docs.google.com/file/d/0B3vywie-X5zudXNfT1dvQ2puMzQ/edit?ups=drive_web should I install Qt libraries 4.8.4 for Windows (minGW 4.4) so that it works ? (I tried it befor but there a .h file that it doesen’t find during the installation) thanks in advance