Belkin USB wireless 6050

Hello

Fool that I am, I tried to install these using the XP
drivers on the Belkin site. I did (how I know not) get
them to work for a time (I have two windows XP home PCs
that I'm using them on). However, now it seems to have
gone belly up. I can't get them to work and when I try to
connect either PC to the internet using their internal
modems (my only method of internet connection), they crash
(screen goes blank and then restarts). Is there a kindly
soul out there who can put me out of my misery.