smjh1371 wrote:do I need to install arm-gnu toolchain and yagarto tools for the version 17 or they're already there ?
there are no special settings for win 8.1 ? I'm getting the errors I asked again and again and nothing works!!!!!
You don't need to install anything, it is supposed to work out-of-box.
I don't know why it does not work for you but it woks for the rest of the planet, I already suggested all the known causes of problems and I am out of ideas now.
My final recommendation: try installing it on another PC.