We have a small network with 12 clients in route to a switch up to a router and finally to a modem. Off of the switch is a server running Server 2008 R2. We are experiencing slow internet. The problem is on the network inside the building. Wen I disconnect different clients from the switch internet speeds pick up. Some days it is client 1 that we disconnect, other days it is client 2. Today I disconnect the server and Internet speed picks up. The problem seems to be floating through our office. Had many IT professionals work on this problem with no luck. Recently purchased a new Dell Server to see if that would solve the problem. Installers copied over all profiles, etc from original server and still having same problem. Replaced switch & router. Problem has not disappeared. Running a <tracert> at the CMD prompt and seeing speeds outside pick up from 2800MS to 35MS when we disconnect the clients and/or server. No software / backup is operating on the effected clients when this occurs.