I have about 10 systems at my office running a client/server SQL software, all machines including server are just plain old XP pro systems. For some reason 3 of the machines are experiencing some kind of bandwidth limitation both within the network (moving a file from the server to an effected client) and to the web (speedtest.net showing .95-1.2 mbps whereas all other machines getting 2.5-3 which is what we pay for. All machines have all microsoft updates done, have zero "bugs" on updated malwarebytes and AVG scans and are behaving normally for all other intents and purposes. I also just tried a new NIC card on and and still have the same issue. I am very close to just reformatting one with a fresh windows install to see where I get.