I have a LAN at home of 4 computers which are connected via a router ( SMC Barricade), I was using windows 2000 ADvanced server before , but recently decided that I wanted to scrap down the server-client as the advanced server was getting really slow. I reformat the Windows 2000 server computer and decided to install Windows XP professional instead. However ever since I installed XP professional, my LAN network was getting really slow...