Hi Guys New to 2003 server (I come from a Unix background) and am having some problems. Setup: Mixed network of 95/98/2000/xp pro/2003 and a Sco 5 box all running on a Mitel 3100 voip phone system as network backbone. 4 XP pro m/c's form part of the 2003 domain, put in to run Pegasus Opera accounts and it is these machines that are causing the problem. These machines keep slowing down (including mine, which narrowly avoided going through the window today). It is only the machines on the domain that are having problems, at one point if I pinged "office" it was going off site and pinging office.com! Got that fixed, but the slow downs are really getting to me. The Mitel must run the DHCP server. Any suggestions on how to approach this problem? I have installed WINS on the 2003 server and tinkered with the DNS settings to no avail. At the point where I am going to reformat the server and stick XP on it and revert back to a simple peer to peer network. TIA Steve