System Freezes

Sometimes at initialization of LW 1.8 the limewire splash page will only load a big white rectangle on the screen and the client will not launch. the white rectangle is unremovable, and sometimes the client will freeze while it is running, it is also unremovable. after either of these freezes occur, the keyboard does not work. the only thing that does is the mouse and it will not click anything and eventually it will give a series of blue screens of death and the computer will not shut down expect by turning the power buttom off. I also used XoloX and could not get it to do anything at all past loading up it freezes also, but i can ctrl-alt-del to get out of it when it freezes, i cannot do that when limewire does.

Windows ME
Zonalarm
ADSL connection with server assigned IP at log on (IP changes each session)
AMD K6-2 550
448 MB ram (shows 314 MB free)

any ideas?