Have you ever done something to your computer and realized that it was not wize  

Have you ever like added an external hard drive and then realized that you formatted it with the wrong file system FAT32 instead of NTFS and only realized what you had done after you had started using it. Or downloaded something iffy and then turned off your computer only to have it not come on again. I just moved all of the folders of of my external harddrive and then reformatted that hard drive properly, then I realized. You just changed the file paths for all of those folders. Well can't win em all.