Im not sure if i have some virus or something but for the past few weeks my files and applications keep disappearing. like i had a folder full of images and then later on i only have a few left? and my textedit and vlc player disappeared from my applications folder all of a sudden. now i did not delete anything myself. i mean even if i did i dont think i would delete textedit. plus i only have one account on this computer and no one else logs on. does anyone know what could be wrong? i used disk utility and repaired the permissions and tried to fix the disk but it didnt help. I reinstalled the os and got textedit back..... but i just need to know why these things happened? does this happen to anyone else what can i do to prevent it?