periodically slow/freezing network
the network is periodically slowing/freezing down in all rooms for some reasons. when a student navigates their network drives and folders suddenly the egg timer appears for about 10 sec and then it goes away and the navigating becomes smooth and fast and then after about 5 minutes or so it happens again. it happens throughout the network. The internet speed is fine, I used http://speedtest.net/ to check, the download speed is 16399 and the upload speed is 7693. it is just the periodic freezes while navigating through the network drives. I checked our cabling it is fine. The only thing I did recently is that I modified the Application Control "default policy" in Sophos Enterprise Consol to stop pupils from playing games and using Ultraserf. I have now disabled that policy but the problem is still there. Any idea guys please help.
Sorry I just realised i posted the thread in a wrong section of the forum but I dont know how to move it to the network section