Network Problem

[keenming]

I have a home network when 2 desktops and a laptop are connected together. The computers are able to surf the net through a cable modem via a router. Recently I have a problem with my laptop on the network. The laptop will disconnect itself from the network after a couple of hours and are unable to access the net. This happen both at my home and office network.
Any help will be appreciated. Tkanks

 

[smah]

Look in Device Manager at your network card power settings. Make sure that 'Allow the computer to turn off this device' is not checked.