Have 5 assorted pcs networked. 2 of them are 900 MHz, running Win ME, 1 is 450 MHz running Win 98, 1 is 600 MHz running Win 98 and one is 266MHz running Win 98. Had "Guru" tell us that the 266 is slowing the network down to a standstill and that we need to upgrade. Is this correct? Thanks for any info. Networking is still a very grey area for me!