why i always have a red cross while i am downloading

azn_mafia88

i have read the forum.
" L( n; z  J$ j1 @: Q& u公仔箱論壇they say the "red cross" mean no space on your computer
  \3 ~+ {, V- k: u" T$ X4 W 9 a) a6 s' n- \2 e+ \6 }+ ~
but my harddisk is not full...how come it still doing that