I work IT for a dealership and recently one of our main pc's internet keeps going on and off few few mins/hours sometime and while that's happening we cant use our cash drawer, printer or receipt printer on the other pc's because that end pc is the main one we use. I've tried replacing it with another pc, another wire and nothing working. Id assume it is the wired access point its using ? 5 out of the 6 work fine that are all on the same network! Please help me! PC is win7 like all the other ones. Dell optiplex 780.