I have a Athlon 64 bit machine running both 32 bit and 64 bit FC-3 on separate hard drives. I just got a HP laptop with an Athlon xp-m chip and loaded FC-3 32 bit on it. I have a USB Zip-100 drive and a Logitech cordless USB mouse. Both of these operate fine on the 64 bit machine with both the 32 bit and 64 bit OS's. On the laptop they work sometimes but most otf the time they don't. I looked through the archives but so far haven't found anything. Does anyone have an idea about this behavior. I think it might have to do with the mobile chip. Dave