http://www.catb.org/~esr/faqs/smart-questions.htmlReally, there is no "force close" on Windows, you haven't said what OS you are on ("force close" is a term usually used on Android, and you can't install Rockbox on a Clip+ from an Android device), what exactly does this "force close" etc.
I already answered to a similar post of yours. Again: please follow our posting guidelines, this is the wrong forum *again* (though another one). You really can't expect people to help you if you are neither specific nor follow the guidelines.