As noted in thread below, I'm running W4 FP15, stand alone except for the Internet. My tcpip is 4.00e. I have the scsi scanner and USB printer and now FF2 and T-bird working fine. Are there good reasons to take the long, arduous and hazardous route of upgrading?Probably the simplest solution would be to buy eCS, which I'm sure I will have to do eventually, but I have my OS so lean and does everything I need so efficiently, I would rather struggle with the upgrade than break in a new os. Steve