THe more it seems to download after about 30 mins will shut my hole xp down it hangs then freezes the pc unfreezes shortly freezes again

i habe no virues hanve norton personal firewall on a router with firewall
i run norton system works have had np with XP on this box just limewire

pent 3 448 mhz
320 SD ram
XP

help plz i like this program shame it got a glitch