lol, why did you end it with a blue screen? what will happen is, that all parts of the system, still in memory, will still kinda work and all opened files contents will be available until closed. so the system slowly glitches and becomes unusable. you may see a ton of errors or graphical glitches, depending on what you did. your launcher may become empty and you can't start more apps. all non-builtin commands in your shell won't work and you'll get weird errors that your current dir and your home dir is missing.