Hey Guys, I wrote some code in Code::Blocks and it laggs(the speed changes really often) really stronk(In Debug and Release, also the .exe in the Folder).
So, I tried it on an other PC and it worked properly, the same project.
Im using Windows 7 Professional, Code::Blocks 13.12, SFML 2.1.
And my system is well enough, for playing my game properly for sure.