EDIT: Okay I found the Problem but I can't fix it, I accidentally hit OPEN WITH. and I hit Notepad but the ALWAYS OPEN IT WITH THIS APPLICATION was Checked,I can't assemble .s files anymore, sappy closes itself and has that Don't send stuff, Anyway that I can fix it? I need to finish what I started!
You must download some kernel32 fix to make this work. Worst case, you must re-install your OS (Windows XP would be fine, and I mean a full re-formatting).