Ubuntu 13.04 consuming the whole network speed from router

view story

http://ubuntuforums.org – Hi, I just recently upgraded to 13.04 We have a four computers at home and we have 15Mbps Network connection which we share using a Netgear Router. I use ubuntu and the rest of the guys computers are using Windows 7 OS. When my computer (with ubuntu) is connected all the other windows PCs Network speed is going down drastically low. We checked the speed of internet using www(dot)speedtest(dot)net When Ubuntu computer is connected to the Router : Only Ubuntu PC is showing 15Mbps speed and rest all windows PC's are showing speed of around 0.09 Mbps (Hardware)