The basis is that you have not indicated in your question what places you have researched before asking, or what work you have done to try to figure it out and where you got stuck. You can find here some tips how to ask good questions:
No question is stupid. But a question can be asked without putting enough effort to figure it out, essentially asking volunteers on this site to do the work for you.
At the very least, please include some background and links to what you found by using a search engine with the above error, as well as documentation, and motivation what you are trying to achieve. For example in the above question, if you mentioned that you have a program SetWindow.exe in your PATH and you are expecting it to run, you would have probably noticed the typo.
What I recommend everybody is to start typing the question here, provide the background and research and as you do it, often times you figure it out on your own. This happens to me all the time, just the process of asking the question often helps me figure it out. Then you don’t need to ask. Some other times you can’t figure it out, so then you go ahead and post the well researched question.