my daughter was watching a video off her jump drive  my laptop. all of a sudden, i was every file on my computer disappear. now when i turn on the laptop, i see the dell logo, the screen goes black, there is a white bar at the bottom that says "Windows is loading files", then after loaded, i get the startup repair window,then "startup repair cannot repair this computer automatically"  on "view problem details" i get  following:

problem signature:

problem event name:     startup repair offline

problem signature 01:   6.1.7600.16385

p s 02:  6.1.7600.16385

ps03:  unknown

ps04:  4

ps05:  autofailover

ps06:  1

ps07:  missing OsLoader

OS Version: 6.1.7601.2.1.0.256.1

locale id:  1033

i also tried f8 at startup, and i can't access it.  it seems  only thing i can access is the command prompt.  i also  the Windows memory diagnostic with no errorserrors.  please help...