I am having a similar problem. Set up seemed to go all right and the "Hello world!" test or main program builds and runs without any problem. Problem begins when you click on Save As, rename the file, and type in new code. The build proceeds without a problem, but the display remains the same, "Hello world". Is there a text or pdf somewhere that tells a person exactly how to set up CodeBlocks on a PC running Windows 7? In CodeBlocks, what is the difference between a file for a program and a "project". When you write a new program what are the files that make up that program? Please advise.