Weird Situation with Vinux

[Tim Chase]

It would help to either know a part of the file-name or how you 
downloaded them.  If you know a part of the filename, you can use

  find $HOME -iname '*part*i*know*.iso'

where "*part*i*know*.iso" is some file-spec/glob that would match 
the parts of the filename you know.  If that doesn't work, you 
can search the whole hard-drive with

  find / -iname '*part*i*know*.iso' 2>/dev/null

(the "2> /dev/null" prevents it from reporting errors if 
filesystem permissions don't let you descend into a 
subdirectory).  If for some reason you downloaded it as another 
user, you might want to run the command as root to have deeper 
digging capabilities.  Depending on the number of files on your 
disk and your disk-speed, these commands might take a modest bit 
of time.

Knowing what tool you used to download the files might also help 
guess at where the files ended up.

-tim