Internet drops on one PC but not others

[SpiceRack]

One of my laptops drops off internet when on for 5 minutes. All other PC working normally. This happens both when using wireless and directly connected to cable. When direct connected to cable, the orange network light is on but no green light (activity). In both cases the network shows as being connected with strong signal but not response.  Any ideas? After removing all other PC's from network, problem still persists.

[Rob Pomeroy]

Have you tried connecting using the cable with the wireless switched off?  Because it sounds like when the network cable is connected, it's still trying to use your wireless connection.

Some specs would help - make and model of laptop, operating system, network cards etc.

[squall_01]

try scanning your pc lately for maleware an what not?