The previous comments will get your windows commands executing. I wanted to make sure you understood that you can't execute code on a client computer from the server (or at least you shouldn't be able to). This is for security reasons, imagine the fallout if any website could execute arbitrary commands on client machines. With that power, any given website could take data off of your hard drive (think quicken files or other financial records) and then erase (or worse change) that data so you couldn't use it any more.