I don't think anyone here knows your password either. There are quite a number of people here who know a lot about windows but the information you posted doesn't really make a lot of sense, more specifics on what you have actually tried. If you want help on installing windows 8, you should go to the microsoft site or to a windows forum. If you have already tried the suggestion posted in post #2 above, you need to indicate what happened.
You don't "uninstall" operating systems the way you do applications. Simply format the partition on which you have whatever Linux you installed which you should certainly be able to do with your windows flash.
Last edited by yancek; 11-06-2014 at 08:13 PM.