We have an NT4 server connected to 40 computers by two 100mbs baystack switches.using cat 5 cables.we recently upgraded to a new version of our accounting software.It slowed our network speed by half.The software manufacturer says that its a networkproblem.we upgraded our device drivers for our newtork cards on workstations which are gateways with pIII(800MHZ) in them.We also have the latest anti virus download.(tried disabling anti virus but had the same results)The accounting software is located on our server.How can I speed up network