At work we have a network cable coming into the building from a server that distributes the internet to various departments. So far this has been in a D-Link DI-624, which has served as an access point. We recently received the department's computer, which will be available at this network, so that the internet is readily available on the job. (Lenovo Ideapad U550 running Windows 7) When I tried to connect this to the D-link wireless network sent out, it was connected in 20 seconds, then restarted the link itself. After wondering about this for a while I glanced at d-link, which clearly restarted when it was disconnected. (All the lights flashed, and it seemed like a restart). Tried to connect the PC to the D-link with the cable but the same thing happened then and thinking that the router was dead. Found a U.S. Robotics router, I thought about trying to do the same. But this had to start the wireless, then I connected the router to PC via cable to check the settings, when I notice that it also restarts itself after a few seconds. Tried to start the d-link with just the cable from outside, without restarting the wireless on the PC. I then connected to the phone, and there was no restart. But at the moment the PC tried to connect to the network and it started giving the problem once again. Currently my PC is connected in a Netgear switch, which is stable, but cable is not a long term solution. Any idea what might cause this, both wired and wireless, with two different routers? It is only those I have available, so do not get tested more. Tomorrow, I thought to check whether drivers are updated but can not imagine that there are drivers when it happens the same on cable and wifi.