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While I am using my computer either surfing or not my internet connection fails, but when I see the network icon or the network connection it still indicates that I have internet.

However, sometimes but not that often, the network icon indicates that I lost internet connection. I have to very often perform ipconfig /release and renew, even when I start my computer.

This thing is happening with other computers as well. In my computers I have windows 7 and windows 8 running.

I have called the internet providing company and they say that there is nothing wrong with their connection or router. Their device is wireless router and they say that they are not sure it is a problem with the wireless router. They offer to send a technician over, but I have to pay the trip expenses and if the problem lies on my side, I have to pay them per 15 minutes of work.

Any idea what should I do?

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