why i always have a red cross while i am downloading

azn_mafia88

i have read the forum.
# W) G4 y  a! U8 Z3 N& k; Y# `4 qtvb now,tvbnow,bttvbthey say the "red cross" mean no space on your computer5.39.217.768 J/ d" P# m, m( N7 C

. Z2 i# _! Y% d3 j# pbut my harddisk is not full...how come it still doing that