EQ randomly CrashingFollow

I have 2 computers on my network, my main computer runs EQ fine now but before It would constantly crash like my second computer till I deleted all the forwarding ports on my router, now its only the second computer that constantly crashes, it just drops to desktop giving a Crash error and sometimes it just locks up and I have to Ctrl+alt+Del out of it, then relaunch. and its at the worst damn times EG. Fighting in BoT. seems to happen more when Its geting alot of data example:a large fight with lots of spells and stuff, it has a 1.2ghz AMD Athlon, 512 ram, Geforce 3 64mb, 1.0 Gb free space, runing Windows XP Pro. if anyone knows the fix to this please let me know, I have all the latest drivers and DirectX. Plz help