Wireless Network Problems...

[MilitantB0B]

I could not convince my parents to let me run a wire so I am stuck working with my crappy wireless network.

My house is set up with a wireless network to network out the houses cable internet computer to all of the computers of the house. The problem is with the recent eddition of my computer. My computer is on the third floor and the transmitter is on the first floor. My computer will have no problem getting on the internet at first, but after a few minutes it will stop receiving information and only send. It still says I have a good connection but I cannot access the router or use the internet. If I turn the router off, then back on, it will work for a couple more minutes but stop again/ Any body have any idea what this could be?

Thanks in advance.