It's either the modem/router, the cable or the desktop/laptop. A laptop is easy to try elsewhere, a different cable is also easy to try. If you have a separate router (not integrated in them modem) it's easy to try another one too.
Trying a desktop somewhere else is a little bit cumbersome. It might be easier to ask a friend with a laptop to try with you. If that works well, the final test - alas - involves trying your desktop somewhere else.
I am using broadband connection on Windows 7 Ultimate and from last two days, internet is not working properly.
It connects and disconnects in minutes, sometimes it is showing that network cable is unplugged but when I plugged it correctly, then again it is showing the same error. Help me