Limewires fine till i start downloading seems the fatster the download 40 kbs the faster it crashes my pc then the pc will hang FROZEn come alive till again hang any ideas?

Ive got a pnt 3 448 mhz
320 SD RAM
windows Xp
On a router

I know a little, i know there r no virues on this machine
and files r in order
I run Norton personal firewall and norton system works this the first problem ive had with XP on my box