why i always have a red cross while i am downloading

azn_mafia88

i have read the forum.5.39.217.76$ D3 d  e, d: |4 u3 e% [/ z
they say the "red cross" mean no space on your computer* X4 V& j7 ^( t( |
) L3 k+ K! m) V
but my harddisk is not full...how come it still doing that